It doesn't have to be for much; little things suffice. When I'm miserable enough that death starts to seem attractive, then I think about obtainable things that make me happy.
I think about the sound of the rain.
I think about my favorite foods, prepared just the way I like them.
I think about the films I'd still like to see, or the books I'd like to read, or the places I'd like to visit.
I remember the faces of the people who love me, and who would miss me if I were dead.
I think about the people or the person I'd like to touch, even if it was just one more time. One touch can lead to another.
Those are the things that help me. I hope they helped you.