It is so easy for me to dwell on the negative things in my life. When I realize how blessed I am to be alive and in excellent health, then the negative things seem like they can be overcome. Take a good look at the posts on this website. So many stories, so many people hurting in so many ways. Then, go look in the mirror and tell yourself: "My problems are not that bad in relationship to the others!" Get on the Internet or get some books from the Library to learn how so many others in areas such as Africa, India, or Haiti deal with extreme poverty everyday.
Try to focus on solutions to your situation. If you are Christian, Jewish, or other type of religion; fellowship with others at a place of worship. Do you believe in prayer? Pray and ask others to pray with you! If you need help with overcomming an addiction, or other "life issue", get help! There are many types of help. Groups such as AA, NA, Support Groups, and Celebrate Recovery have helped many. Need money and a job? Asking for donations is fine? Maybe try to think of doing a temporary job. I see people every day with Masters Degrees, that can't find work in their profession; the are working any job the can find now.