Things we could do:

School work
Work work
Ted ED riddles
Practise Rubiks cubing
Practise HEC-HMS
Practise new jiu jitsu moves
CBT exercises
Swing a kettlebell
Feed the birds
Watch psychology lectures on YouTube
Read about project management
Read books
Watch movies
Phone a workmate
Phone a friend
Listen to albums
Listen to podcasts
Play Oddworld Abe’s Oddysee
Play Scrabble
Walk at the park
Jog at the park
Sprint at the park
Sit zazen
Cook new recipes
Paint some of the house
Ride the bikes
Clean the bikes
Clean the car
Lie on the couch