Re: a serious question.
I've felt extremely depressed at times, but i never really thought about it reaching that level. Because it's strictly forbidden in Islam and i just think of the consequences i'll face if i take the decision to end my life against Allah's will.
Think of it as my....motivation, to face difficulty, to deal with issues at hand, and when i can't do something, i just let it be until i'm in a position to resolve the 'issue'. like HHL put it, more than often it's the satan, then other times u have to think of it like 'Allah tests his creation to see if we give up so easily in the face of difficulty'.
You weren't born by will, u won't die by will (If you follow the right way). It's the least you can do. :) and i mean you in general, not just you specifically.