01The 7 Deadly Sins of Sleep (And How to Fix Each One)

Most people know they should sleep better. What they don't always know is exactly what they're doing wrong — and how straightforward the fixes can be.

Below are the seven most common sleep-wrecking habits, what's actually happening when you do them, and what to do instead.

03Sin #1: The Snooze Button Habit

It feels like a gift — nine more minutes. But what's actually happening isn't rest. When your alarm goes off, your body has likely already begun the wake-up process: cortisol is rising, your heart rate is climbing, your brain is preparing to come online. Hitting snooze interrupts that and pulls you back into fragmented, light sleep — which leaves you groggier than if you'd just gotten up the first time.

Sleep doctors call this sleep inertia: the disoriented, heavy feeling that comes from being yanked out of light sleep. Multiple snooze cycles can make it worse.

The fix: Move your alarm across the room so you physically have to get up to turn it off. Or better: go to bed earlier so waking up doesn't feel like punishment. If you're consistently exhausted when your alarm goes off, that's the real problem to solve.

04Sin #2: Oversleeping

More sleep isn't always better. While most adults need 7–9 hours, consistently sleeping 10+ hours — especially if you're still tired — can signal an underlying issue like depression, sleep apnea, or thyroid problems.

Long-term oversleeping has been associated with increased risk of cardiovascular disease, Type 2 diabetes, and cognitive decline. It's also linked to lower physical activity, which creates a cycle that's hard to break.

The fix: Track how much you sleep and how you feel before and after. If you're regularly sleeping 9+ hours and still feel tired, it's worth mentioning to a doctor. The goal is quality rest, not just quantity.

05Sin #3: Too Much Caffeine, Too Late

Caffeine blocks adenosine, the chemical your brain builds up throughout the day to make you sleepy. That's how it works. But caffeine has a half-life of roughly 5–7 hours, meaning half of a 3pm coffee is still active in your system at 9pm — and is still partially active at midnight.

Most people underestimate how much caffeine they consume and how late its effects linger. Energy drinks, pre-workout, sodas, and even some teas all count.

The fix: Set a firm caffeine cutoff at 2pm. If you need something in the afternoon, try green tea (lower caffeine, smoother energy) or just a 10–20 minute walk, which is surprisingly effective at fighting the afternoon slump.

06Sin #4: Alcohol Before Bed

Alcohol is a sedative, so it does help you fall asleep faster. The problem is what happens next. As your body metabolizes alcohol in the second half of the night, it disrupts REM sleep — the stage most associated with memory consolidation, emotional regulation, and feeling genuinely rested.

The result: you wake up having technically slept 7–8 hours but feel unrested, foggy, and sometimes anxious. Even one or two drinks within a few hours of sleep measurably degrades sleep quality.

The fix: If you want a wind-down ritual, try tart cherry juice (a natural source of melatonin), chamomile tea, or warm milk. Save the nightcap for occasions where the social moment is worth the sleep cost.

07Sin #5: Screens in Bed

The blue-light-suppresses-melatonin argument is real, but it's only part of the problem. The bigger issue is cognitive activation: phones and screens keep your brain engaged, alert, and stimulated — the opposite state you need to fall asleep.

Checking email or social media right before bed doesn't just delay sleep onset; it can raise cortisol if you encounter anything stressful, frustrating, or provocative — which is most of what social media is designed to deliver.

The fix: Charge your phone outside the bedroom or on the far side of the room. Get a simple alarm clock. Give yourself 20–30 minutes of screen-free wind-down time: reading, stretching, dim lighting. The goal is a brain that's decelerating, not accelerating.

08Sin #6: Napping Wrong

Naps aren't inherently bad — in fact, a well-timed nap is a legitimate performance tool. The problem is napping too long, too late, or too often in a way that bleeds into your nighttime sleep drive.

Napping past 3pm or sleeping for more than 30 minutes during the day can reduce your body's pressure to sleep at night, making it harder to fall asleep and degrading the quality of nighttime sleep.

The fix: If you nap, keep it to 20–25 minutes and finish before 3pm. If you want to maximize the effect, try a coffee nap: drink a cup of coffee right before lying down. Caffeine takes about 20 minutes to kick in, so it hits as you wake up — giving you a sharper rebound than either the coffee or nap alone.

09Sin #7: Bragging About How Little Sleep You Need

The hustle culture badge of sleeping five hours and grinding through the day is not admirable — it's a sign of poor planning, or denial about what's actually happening to your performance.

People who are chronically sleep-deprived consistently overestimate how well they're functioning. Objective cognitive testing shows real impairment even when people feel they've adapted. You're not crushing it on five hours. You're operating on fumes and not noticing how much you're losing.

A small percentage of people have a rare genetic variant that genuinely allows them to thrive on less sleep. If you don't have that gene (and statistically, you almost certainly don't), you're just sleep-deprived and used to it.

The fix: Treat sleep like the non-negotiable it is. Protect it. Most people who start consistently sleeping 7–8 hours report significant improvements in mood, energy, and work quality within a few weeks.

10The Sleep Environment Piece

Good habits only go so far if your sleep environment is working against you. A hot room, a noisy environment, or a mattress that creates pressure points and disrupts your sleep posture can undermine everything above.

If you're doing most things right and still sleeping poorly, your mattress might be part of the problem. At LA Mattress Store, we have five showrooms across Los Angeles where you can test mattresses the way they're meant to be tested — by lying on them. Our team can help you find the right feel and support for your sleep style without pressure.

Browse our full mattress collection or find a showroom near you. Every mattress comes with a 120-night comfort guarantee.

11Frequently Asked Questions

Why does hitting snooze make you more tired?

Snoozing pulls you back into fragmented light sleep and interrupts the natural wake-up process your body has already started. The result — called sleep inertia — can leave you groggier than if you had just gotten up the first time.

How late is too late for caffeine?

Most sleep experts recommend cutting off caffeine by early afternoon — 1pm to 2pm. Given caffeine's 5–7 hour half-life, a 3pm coffee can still noticeably affect sleep quality at 11pm.

Does alcohol really ruin sleep?

Yes, particularly REM sleep. While alcohol helps you fall asleep faster, it disrupts sleep architecture in the second half of the night. You may get the hours, but not the depth of recovery that comes from undisturbed REM sleep.

How long should a nap be?

20–25 minutes is the sweet spot. Long enough to provide real rest without entering deep sleep stages that cause grogginess upon waking. Keep naps before 3pm to avoid interfering with nighttime sleep.

Can you really train yourself to need less sleep?

Not in any meaningful way. Research consistently shows that people who are chronically sleep-deprived underestimate their impairment. The adaptation is more about not noticing the deficit than actually eliminating it.