Like the title says, short:
There will be times, and if you're like me, lots of times, where you think it's over. You can't go on. It's too hard. What's the point. Well I'll tell you this: Satan is the prince of lies, and those are lies from him. Give it maybe a day, for me it's usually just a few hours, and you'll be all fine and dandy, compared to depressed and lifeless.
So the solution? Just don't believe the lies in the first place! Even if things seem bleak, even if things ARE bleak, force yourself, and I mean FORCE yourself to remember the last time you thought everything was ending. And remember how you got over it in the end and got back on track. Because times will come when you feel that way, and you'll get over it. It's best to just not get depressed in the first place. Maybe you'll have to put on Pillar and crank the volume so the next county over can hear it, but Do. Not. listen to Satan. All it will do is cause hurt and guilt. Neither of which are from God.