The first step is to sit down with your partner and determine what the issues are. Any issue that has caused either one of you to feel like the relationship is broken needs to be addressed. Have this conversation without your children (if you have any) around, and try not to have it in the bedroom (as this is a place for love and family). It may sound stupid to you now, but it may help to mend your broken relationship if have a pen and paper to keep track of everything.
Now that everything is out in the air, you need to work together to figure out what it is going to take from both of you to solve the issues at hand, and mend the broken relationship. Due to the complexity of many of these issues, and the wide range of possibilities as to what these are, it is easier said than done to figure out the approach. The proceeding steps will offer advice and a generic approach that you can tailor to your needs, depending on what they are.
Never close the lines of communication. Always talk to each other to keep each other posted on any new issues that could arise out of your attempts to bring yourselves back together. If you talk to each other, you may find that there were misinterpretations or miscommunications that created the issues to begin with, so a major step is stopping the potential for those by talking to teach other.
Make time for each other. Start getting a babysitter (if you have children) more often and going on a date at least once a month. If you can’t go out or finances play a role in your inability to date, then you should make your own dates at home after the children go to bed, or after you get off work. Make dinner together, and throw in a movie. What matters is that you are spending time together. Spending the time together in a positive atmosphere will help mend the broken relationship.