Do not be afraid to disagree with your partner. Honest conflict keeps a relationship alive. However, to disagree positively, you need to accept that your partner is an individual with his/her own set of values. "It helps if you can communicate grouses to each other so as to avoid misunderstandings." Share your feelings openly so that problems can be solved in their initial stages.
Misunderstandings often happen because we are afraid to say no to our partners. Saying 'no' once in a while is very important. Too much of compromise makes you lose yourself. A couple can neither be completely independent nor completely dependent. They need to be interdependent. Mutual give and take is important, it helps couples retain individuality, yet be part of a pair.