Every relationship goes through highs and lows. It can be stressful to dwell on the lows of a relationship, so it is important to determine if your relationship is in fact worth saving before going through the necessary steps to rectify the situation.
If you deem your relationship worth saving, the most important element to remember is to put in more time for communication with your partner. To save a relationship, both parties must not only voice their concerns and needs, but must also take the time to listen the other. Too often, relationships dissolve because one or both parties do not make the effort to communicate properly and understand what the other wants and how they feel.
It is also important to let your partner know how much you appreciate them. Never minimize their accomplishments, no matter how trivial they may seem to you. Always treat them the way you would want to be treated. This is the golden rule, after all.