I'm going to just collect my tips here over time.... More to come!
For food storage:
Store all fermented foods upside down in their container. They'll keep for longer.
Label children's clothes by age and season, i.e. Girl 5y W for 5 years, Winter. Or B12mS for Boy 12 month Summer. Maybe have neutral too, for stuff that is good for boy or girl... NNbW = Neutral Newborn Winter.
Flower Arrangements: Add sugar to water. Not a penny - that smelled horrible.