Well you just got to put shit in perspective, if you find that your life is full of nothing but pain, anguish and is basically a living hell without ANY strands of happiness and you believe that nothing is ever going to change.
Then you should consider topping yourself, then you pass the pain on to your loved ones, which if you love them in return you wouldn't want to. So all in all, its just a bad idea in the 'here and now' sense and in the long run because most of the time like that dude with the fucked up avator said, its just trivial things.
I advise you to go to the top of a hill at sunset av a smoke and just watch the sun go down and the stars come out, if your still depressed after that I dunno whats gonna do ya