Cultivating a great relationship takes lots of work. However, it's the small -- even easy -- things that make the biggest difference. These 40 things are simple, but their impact can be grand:

1. Do her favorite activity with her

2. Put the seat down

3. Put her photo on your desk

4. Go to bed early, just to talk

5. Take her on dates

6. Don't look at pornography

7. Write her a love letter

8. Confront problems

9. Let her wear your clothes

10. Call her by a nickname

11. Do what you say you will

12. Take pictures with her

13. Fill her car with gas

14. Be your best self

15. Cook her dinner

16. Make her your No. 1 priority

17. Set goals with her

18. Plan a girls' night out for her

19. Admit your mistakes

20. Look your best

21. Kiss her lots

22. Share household responsibilities

23. Bring home her favorite tasty treat

24. Try to get to know her even more

25. Care about her family

26. Tell her what you like about her

27. Brag about her

28. Forgive her

29. Ask her advice

30. Celebrate her successes

31. Refuse to compare her to others

32. Tell her your secrets

33. Surprise her

34. Love her kids

35. Text or call her in the middle of the day

36. Don't talk badly about her

37. Hold her hand

38. Listen to her

39. Leave her notes

40. Tell her you love her