It's not difficult to make a woman/man happy.

For a woman a man need only be:

1. a friend
2. a companion
3. a lover
4. a brother
5. a father
6. a master
7. a chef
8. an electrician
9. a carpenter
10. a plumber
11. a mechanic
12. a decorator
13. a stylist
14. a sexologist
15. a gynecologist
16. a psychologist
17. a pest exterminator
18. a psychiatrist
19. a healer
20. a good listener
21. an organizer
22. a good father
23. very clean
24. sympathetic
25. athletic
26. warm
27. attentive
28. gallant
29. intelligent
30. funny
31. creative
32. tender
33. strong
34. understanding
35. tolerant
36. prudent
37. ambitious
38. capable
39. courageous
40. determined
41. true
42. dependable
43. compassionate
44. passionate

Without forgetting to:

1. give her regular compliments
2. love shopping
3. be honest
4. be very rich
5. not stress her out
6. not look at other girls

And at the same time,you must also:

1. give lots of attention,but expect little in return
2. give her lots of time,especially for herself
3. give her lots of space,never worrying about where she goes

It is also very important:

Never to forget birthdays,anniversaries and arrangements she makes.

How to make a man happy:

1. show up naked
2. bring beer