The first cardinal rule about relationships - learn how to communicate. For many couples, the more comfortable the relationship becomes, the easier it is for the communication to get taken for granted -- so you need to put constant effort into it. Make it a priority to talk to your lover. It doesn't matter if it is about work, your troubles, or even your emotions. Talking with your lover is sure to bring you two closer to each other.
Another thing that you need to look into if you want to save your marriage is the amount of quality time you spend with your wife or husband. Marriage can easily take its toll on both your individualities so make sure to allot time for just the two of you. It can be as simple as a stroll in the park, or a private island getaway to a dream destination. Sometimes all you really need to save your marriage is a chance to go back to the days when you were madly in love with each other. You will be amazed by what a simple dinner date can do for your relationship. Instead of wallowing in the negative aspects of your marriage, take a breather and look at the positive side. A change of perception can do so much in ensuring that you have a harmonious affair.
Lastly, you need to learn to let the small things go, especially if it is only going to cause stress in your marriage. If you want to make a relationship work, you need to learn how to separate the superficial concerns from the issues that matter the most. Don't waste your time and energy over issues that just aren't worth focusing on. Once you have talked through a conflict, avoid bringing it up again another day. This is the only way that you will be able to keep your marriage sane and allow it to move ahead.