1 not cheat - this may sound shallow but it is not easy at 29
2 sacrifice at least one full day per week for her. Without mentioning the fact that there are other things I would rather be doing.
3 always listen closely to her daily stories, rants, raves whatever. This will help her to understand that i really care about what she is saying, even when i do not.
4 plan special events for her that she enjoys even when they are events i do not enjoy.
5 send roses once a quarter to her work place
Thats all I've got. This one is too hard. Good question.