I feel like you have to have a goal in mind. Something to hope for. Something reasonable. Right now I'm depressed and my goal is to pass my math class. If I achieve that, my next goal will be to apply to grad school. If I get into grad school, it will be to graduate. If I graduate, it will be to get a career. If I get a career, it will be to get married. If I get married it will be to have kids. If I have kids it will be to raise them well. And I think that's about all I can hope for in one lifetime. It's all about taking it to the logical next step and starting small. Don't get caught up in the big picture. Focus on what you can work toward changing today.