School uniform gets washed as a job lot on Saturday morning here and as soon as it's dried it's hung up in sets so one hanger has a full outfit including pants on it ready to go Monday morning.
When DD has packed lunches (she's currently a fan of the school lunch menu, that might change all of a sudden) we have Tupperware boxes on the worktop, one with fruit, one with portioned baggies of veg like cherry tomatoes, mini cucumbers etc, one with snacks like breadsticks, crisps etc. in the morning I grab one thing from each box, a yoghurt or cheesestring from the fridge, make a cheese spread wrap and that's the lunchbox done in 2 minutes.
There's a foldable laundry bag in the living room, when DD plays with toys downstairs at the end of playing they go in the laundry bag. When it's full it goes upstairs to her room, is emptied and taken back downstairs. There's also an on stairs storage box (those weird l-shaped specially for steps ones) where all the random crap that migrates it's way downstairs is put. When it's full it's taken up and sorted out.
Letters and dress up as [insert random shit here] notifications go straight in the online calendar with reminders set up. If I get it in physical letter form I photograph it and attach it to the calendar entry with a reminder set up for a couple of days before. If it's a reminder to sort out an outfit then I'll set several reminders over several days if needed so I don't end up waking up on the day of the event and having to colour in a tshirt with a sharpie at 5am.
At least one day a week double up on cooking, so if you're making bolognaise, make twice as much. Freeze the leftovers so you know that there is an emergency meal in the freezer if you can't be arsed/don't have time one day.
At least one day a week do stuff on toast or soup and a sandwich for dinner.you don't need to do a lengthy meal prep and cook every day to eat well so give yourself the luxury of a 10 min to prep and cook meal. It's still good food that's filling, healthy and tastes nice even if it just uses a toaster and microwave.
Use the 2-5 min periods you have wisely. Next time you're waiting for the kettle to boil use that 2 minutes to sweep the kitchen floor or take the bin out. Then you've accomplished a job on your list without it feeling like it's taking up any time.