I realise that I am already doing two of the proposed ideas. Woot!
Shucks.
Bowling
Shopping
Reading
Singing
Talking to friend
Going to the museum
Walking
Writing stories or jokes
Looking at photos
Watching videos
Playing a sport
Cleaning
Napping
Meditating or yoga
Picnicking
Getting a massage
Daydreaming
Gaming
Playing board games
Showering or bathing
Doing puzzles
Doing a word search
Learning something new
Being around nature
Snuggling with a cosy blanket
Playing cards
Rearranging furniture
Listening to music
Playing with pets
Volunteering
Sewing
Driving
Working on a project
Having a snack
Playing pool
Texting with a robot