Open communication. Skeletons in the closet have a way of scaring people. Also compromise. It's sometimes hard to give up something to gain something more.
That its not their job to make you happy and its not your job to make them happy. You are together to share your happiness, not to get it.
Always love unconditionally :D
Take time to make the other person feel loved - appreciated and respected.
the ironing doesn't do itself.
Never take someone for granted.
The other person's pain that was caused by the same issue is as important as yours.
It takes 10 words of kindness to make up for one hurtful word.