I didn't mean this question to be offensive. I do agree a marriage is both 50/50. (Please see my next question about husband's responsibilities.) Let me answer first my own question.
Seeing some of the unsuccessful marriages, the points I feel are -
1. A wife must be able to appreciate her husband's virtues than always grumbling about him.
2. Must be able to adjust with his income than over spending and nagging him.
3. Avoid comparing him with other husbands.
4. Do not fight with him in front of the children.
If you have additional points please add to this list. It may help someone.