Library books keep in a bag, then you don't go round hunting for them. Our library sells a little hessian bag, just the right size :)
Agree with what everyone else said, don't walk around empty handed.
I have a laundry basket for upstairs and one downstairs, it goes on at night, the tumble dryer in the morning and it goes upstairs with assorted crap that shouldn't be downstairs piled on it in the morning after the school run.
In the morning while the DC are eating their breakfast I sort washing out, put dryer on and new load in, empty diswasher so things get stacked straight in it during the day, wipe down worksufaces and hoover the bits off the kitchen floor.
On return from school I whip round the living room with the hoover, and the baby gets given a wipe to clean the sofa for me, and a cloth to dust the surfaces she can reach (it's FUN obv :))
The crap that need to go upstairs gets slung on the laundry basket and taken up.
Then I sit down and entertain the baby MN.
Dinner on a work day is done in the slow cooker (don't brown meat first, it's a PITA and makes it no better IMHO) stew or bolognaise or recently I did stroganoff, I'm branching out :) or 'oven dinner' that doesn't need to be crap, can make an extra fish/ cottage pie and freeze it for busy days. Also sausages or chicken bits cook in 30 mins so not really a bother. On 15 mins dinner days we have pasta/ bacon/ veg/ dairylea cheese sauce concoction quite often.
After dinner, let DC watch telly, clean up all the crap, stack dishwasher and wipe down kitchen, 10 mins job. Make DC tidy toys while bath is running.
Clean bathroom while they are in bath, toilet, sink etc.
Change beds while they are fannying about choosing story in bedroom.
Everything stays clean and you only have to 'find time' to do floor mopping/ shower screen cleaning type jobs.
And online food shop. Just do it. You'll save money, and once you've got it down it can be done in 30 mins while you have a
at work