This is an useful self-help technique. Sometimes I imagine in detail how would it be if I would kill myself. And everytime I do this, at the end of this exercise I remember how much I actually want to live, how many things I could do and how awesome friendships are. I don't have any friends now, actually, but this exercise reminds me to hope for the best.

You say you don't have any plan to commit suicide. As long as you're not a suicidal person, who's also impulsive, I think it would be a good idea to imagine how would it be to commit suicide. You know what's best for you, so you're the only one who decides if you should do this exercise or not.

My point is (in my case, at least) knowing that I can end my life absolutely anytime and choosing not to is empowering.