1. Take a nap when you need it
2. Buy a flower
3. Enroll in a class
4. Rent a funny movie
5. Make a collage
6. Get a physical
7. Call a friend
8. Take a bike ride
9. Go for a walk
10. Visit a museum
11. Roller skate
12. Find a new hobby
13. Listen to a favorite album
14. Write a letter to the editor
15. Buy a coloring book or crayons
16. Donate to a valuable cause
17. Look at old photos
18. Draw a picture of your feelings
19. Ask for help
20. Read a love story
21. Read a biography of someone you respect
22. Write to your member of Congress
23. Schedule a massage
24. Volunteer for an organization
25. Write to a favorite relative
26. Take a hot bath
27. Look at the different colors of flowers
28. Stretch
29. Use rush hour traffic as a time to relax
30. Get a new haircut
31. Scream
32. Look for a four leaf clover
33. Design your dream home
34. Cook a great dinner for yourself
35. Take a walk in the woods
36. Watch a sad movie, cry
37. Take a teddy bear to lunch
38. Spend a rainy day at the public library
39. List your accomplishments
40. Define one goal and how to reach it
41. Learn a new skill
42. Go to a concert
43. Read poetry
44. Vegetate for an hour
45. Have someone else clean your house
46. Meditate
47. Read a children's book
48. Talk to your parents
49. Rescue an animal from the animal shelter
50. Finger paint
51. See a Walt Disney film
52. Try a new healthy recipe
53. Trade skills with a friend
54. Drink more water
55. Take swimming lessons
56. Have dinner with a friend
57. Send flowers to yourself
58. Learn some new words
59. Read yourself a bed-time story
60. Ask someone to read you a story
61. Say "no" to a request
62. Drink a cup of herbal tea
63. Join a gym
64. Dance naked in your living room
65. Go though old diaries, letters, books
66. Tie-dye a shirt
67. Eat breakfast outside
68. Recycle something
69. Clean out a closet, give stuff away
70. Eat something for the first time
71. Get your cholesterol level checked
72. Stand outside in the rain
73. Get your teeth cleaned
74. Go to a sauna
75. Plan and save for a treat or holiday
76. Try cruelty free personal products
77. Give yourself a facial
78. Ask for a hug
79. Give a hug
80. Talk to God
81. Paint some furniture
82. Read a joke book
83. Go to a funny movie
84. Call in sick
85. Pick up the best looking apple and eat it
86. Unplug the phone for an hour or two
87. Take a walk in the park
88. Make amends for an old wrong
89. Learn a foreign language
90. Talk to a friendly-looking stranger
91. Read about other cultures
92. Try something you were afraid of
93. Buy some seedlings, grow things
94. Practice not losing your temper
95. Relive your favorite childhood memory
96. Throw a party for your favorite people
97. Go to a lake, look at the water
98. Think of things to be grateful for
99. Give that good server a big tip
100. Join a new group.

I don't know who the author of this is, but it's a great list!  Try doing one a week!