The mental side of sports is very important for success.  Really, our mentality dictates our quality life.  Belief in ones abilities comes from preparation and having faith.  This is very important when times are tough.  "Things are difficult before they are easy."  To get through the difficulties we must have faith and confidence.  Also, continue to have markers to reach to keep us from getting discouraged.  If times seem tougher it is a good idea to retool and change the next marker we have in mind.  

In a team setting, there are many important phases that build the mentality of success and confidence.  First is Buying-in to the team system and ideas.  Second, is being together.  When times are difficult the team must stick together and be there for each other.  Third, is to believe.  Believe in yourself, your teammates and your coach.  These are three key ingredients for success not only in athletics but life.  It is very important to have a support system that helps guide you and that you can lean on when times are tough.  This system helps to reinforce our belief in ourselves and each other. 

Remain confident and realize that whatever you're doing, it's hard before it is easy but there are ways to get through difficult times more easily.  The main one being a support system.  Anyways, continue being driven and dedicated and mainly have faith.