Communication is important, for everything in your life together: each other, finances, work, etc. It helps build the trust because each knows what is going on in your lives. Try not to go to bed being angry - try to dicuss issues first and try to see both sides.
Enjoy each other and try to take some interest in each other's hobbies, even if they are not shared completely.
Agree with date night each week, with or without children. Make it a decompression time for each. If there are kids, maybe give each other a small amount of personal time to unwind each day, if possible.
I just realized you are also a military wife (take care of yourself as well). If he goes on deployment, it's nice that there is now Skype, Facetime (for Mac), and email to keep in touch as well, if possible.