I have issues with the previous answer -
Hubpages - not free - had to buy the computer and pay for internet.
Feed your dog - had to buy the food
Clean the apartment - without cleaning supples it's not going to be done well.
Take a bus - Really?
Crossword - who bought the paper?
Facebook - see issue #1
Tie your shoes - shoe's aren't free either.
It really wasn't a difficult question, but apparently some thought is required.
1. go for a walk.
2. go swimming
3. talk to someone you care about
4. meet new people
6. use what's in nature to try to fish
7. climb a mountain
8. build a snowman
9. sit and do nothing
10. smack yourself in the face.