Ree1993 gave excellent advice!
I will be married 2 years in November. Here are some things that I have come to embrace:
1. Always put on a united front because some people will look for any hint of trouble and try to prey on that
2. Always be supportive and understand the other person's point of view
3. Think and talk before making any big decisions/plans. I do have a tendency to blow up or make split decisions before really
thinking
4. Definitely set aside a time that is just for the 2 of you to do things (if you make plans in advance to do something whether a date or a holiday, keep it!
5. Stay involved with other positive people (they don't have to be saints, but do not allow other people to get you into trouble) Just because you are married does not mean you cannot hang out!
6. IN-LAWS...if you have problems with them definitely put all of this on the table and do not "pretend" you love them to death when they do things that annoy you..just be civil and thank God you do not have to see them everyday (I am still working on this myself

)
7. Someone else mentioned putting off children and it is well worth mentioning again. We are waiting 5 years and several of our friends who got married around the same time we did have new babies and are really struggling being newlyweds with all of that responsibility. Be resonsible with your family planning whether it be Natural (NFP) or any other method