If you have an infant or toddler, traditional sleep advice ("7 to 9 hours, every night, no interruptions") is offensive. You're not going to get that — not for a while. But you can get something far better than what most exhausted parents settle for: good sleep, even when it's short.
The key is knowing which hours of sleep actually do the heavy lifting, and protecting those above everything else.
The first 3 hours are 80% of the value
Sleep cycles aren't equal. The first half of the night is dominated by deep sleep (slow-wave sleep, N3) — the most physically restorative stage. The second half is dominated by REM, which handles emotional regulation and memory consolidation. Both matter, but deep sleep is what makes the difference between "tired" and "broken" the next day.
Practically: if you can get 3–4 uninterrupted hours of sleep before the first wake-up, you've banked most of your deep sleep for the night. Subsequent wake-ups are costly, but the floor isn't catastrophic.
The "split sleep" strategy
Most new parents try to "go to bed when the baby sleeps" — which often means 9 PM. Then baby wakes at 11, 1, 3, 5. You spend the night fragmented. Total sleep: 6 hours. Deep sleep: maybe 45 minutes. You feel destroyed.
The split-sleep approach: one parent takes the first 4 hours, the other parent takes the rest. The "first half" parent goes to bed at 8 PM and sleeps until midnight uninterrupted — full deep sleep cycle. The "second half" parent takes over from midnight to 4 AM, then sleeps the rest of the night including the REM-heavy hours.
You both still get a fraction of the sleep you'd want, but each of you gets it in functional blocks. Two people running on 5 hours of consolidated sleep are much more capable than two people on 6 hours of fragmented sleep.
The phone-in-the-bedroom mistake
Every wake-up at 3 AM is a fork in the road. You can roll over and try to fall back asleep, or you can check your phone "just to see the time." The phone wins every time, then you spend 20 minutes scrolling, you're now fully awake, and you've burned the rest of the night.
Solutions, in order of effectiveness:
- Phone outside the bedroom. Use a $15 analog alarm clock. Charge the phone in the kitchen. This is the single biggest change you can make.
- Phone face down on the far side of the room. If you must have it close (baby monitor app, on-call work), at least make it require getting out of bed.
- Grayscale mode + airplane mode + Do Not Disturb after 10 PM. Removes the dopamine hook.
Strategic napping (for grown-ups)
You're not going to "catch up" on weekend mornings. Sleep debt doesn't refund that way. But strategic 20–30 minute naps during the day, even if the baby naps for 90 minutes, can substantially reduce cognitive impairment.
- 20–30 min cap — wakes you in light sleep, no grog.
- Before 3 PM — later and you delay tonight's sleep onset.
- Coffee nap: drink a coffee right before lying down. Caffeine takes ~20 min to kick in, so you wake up just as it does. Surprisingly effective.
The toddler phase: sleep regression
Just when you think you've made it through infancy, the 18-month, 2-year, and 3-year sleep regressions arrive. Same principles apply, but a few additions:
- Earlier bedtime for them, not later. Overtired kids sleep worse, not better. A 6:30 PM bedtime often produces a kid who sleeps through the night; an 8:30 PM bedtime often produces a 5 AM wake-up.
- Consistent wake time. Wake them at the same time each morning even on weekends. Same circadian rhythm rules apply to small humans.
- Outdoor light in the morning. Get them outside within 30 minutes of waking. Hardwires a strong day/night signal.
What about co-sleeping?
This is a personal and cultural choice. The data on sleep quality is mixed — some parents sleep better with the baby close (faster response to wakings, no walking to another room), others sleep worse (lighter sleep, partner disruption). What's clear: safe co-sleeping requires specific conditions (firm mattress, no soft bedding near the baby, no alcohol/sleep aids, no smoking). If those conditions aren't met, a bedside bassinet ("room sharing without bed sharing") gets you most of the benefits with much lower risk.
Toggle "Young kids / interruptions" in Dozely — the calculator pushes you toward earlier bedtimes and adjusts the energy forecast.
When to get professional help
If you're 6 months in, the baby is sleeping through the night, and you still can't — talk to a doctor. Postpartum insomnia is real and treatable. Sleep coaching for the child can help, too — pediatric sleep consultants are often more effective than another month of trying random advice.
The parenting years are finite. You'll get your full sleep back eventually. Until then, protect the deep sleep, share the load, and keep the phone out of arm's reach.