There are two main reasons why you are asking: how do i save my marriage? You are either asking this question proactively or reactively.
The proactive reason why you are asking this question is that you want to avoid divorce to happen in your marriage in the future; and you want to know the things that you should do that will enhance and preserve your relationship with your spouse.
If this is your reason, then good for you because you are a worthy partner for trying to find ways in improving your relationship and preserve your marriage.
However, on the negative aspect, if you are asking the question as part of being reactive to your current situation, such as you are now experiencing marriage trouble with your partner which is more likely to end up in divorce; then, this situation is one of worst things to happen in your life.
It is hard to think that the relationship you once worked so hard to make it last is unexpectedly about to end.
Such experience could be very painful to you especially if you have weak emotional profile.
This could easily lead you towards submitting to your emotional instinct by going to your spouse pleading to come back or stay with the marriage.
This move has a very negative effect because it will tend to push your spouse farther away from you.
When faced in this situation, the first step to do is to calm down; relax and try to clear your mind from any thoughts of being depressed and desperate.
This will help you manage yourself and prevent from giving in to your emotion.
When your mind is clear from any negative thoughts, only then can you think clearly on the best ways in resolving the issues.
This method worked perfectly well with others including me; and it eventually solved my problem on how do I save my marriage.