Rule · when
Before going to bed
Done in the period before sleep.

Studies (6)
Paper
Texts to parents helped bedtime routines for children's teeth, but not twice-daily brushingUsedHelpedThree texts a week led more parents to report a tooth-friendly bedtime routine, like no night-time milk, than usual care.
Randomised trial of 154 parents of young children with tooth decay · vs parents who got usual dental care and advice · they rated themselves · ⚠ not yet checked by other scientists; numbers unreliable
Paper
A bedtime if-then plan made each night beat one made onceUsedHelpedMaking a fresh if-then bedtime plan each night got people to bed closer to their planned time than planning once.
Randomised trial of 297 UK adults who wanted to sleep better · vs the same plan made once at the week's start · they rated themselves
Paper
Swapping night screen time for something else did no better than a goalUsedNo differenceA plan for another activity instead of night phone use did no better than a goal to cut it.
Small randomised trial of 55 people in their first year of work · vs coaching to set goals for less evening device use · they rated themselves · ⚠ many people dropped out; summary claims more than the results show; numbers unreliable
Paper
More teens who pictured tomorrow's task at bedtime got it done within four daysUsedHelpedGirls who pictured starting tomorrow's task at bedtime got it done in four days more often than the sea group.
Small randomised trial of 34 teenage girls in China who put things off · vs girls who pictured relaxing by the sea · behaviour was recorded · ⚠ groups weren't properly compared; numbers unreliable; summary claims more than the results show
Paper
Students put off bedtime less after one short group session, but groups weren't comparedUsedNo comparisonAfter one group session on self-kindness, students put off bed less, but students with no training did a little too.
Small trial of 74 college students who put off bedtime · no comparison group · they rated themselves · ⚠ not yet checked by other scientists; unclear how groups were picked; many people dropped out; numbers unreliable; groups weren't properly compared
Paper
A school plan for bedtime brushing made brushing more automatic for kids, parents saidTestedHelpedParents said brushing was automatic for more kids with a bedtime plan than for kids given one lesson.
Trial of 164 children aged 7 to 8 in Indonesia · vs children who had one usual lesson on teeth · they rated themselves · ⚠ unclear how groups were picked; numbers unreliable; summary claims more than the results show
TestedMixedPlaque was lower than after one usual lesson at one month, but higher at two months.
Trial of 164 children aged 7 to 8 in Indonesia · vs children who had one usual lesson on teeth · they rated themselves · ⚠ unclear how groups were picked; numbers unreliable; summary claims more than the results show
Often used with it




Rule · where5
Put a visible cue where you'll do itA sticker, poster, object or wearable prompt at the point of action.

