If I get you right you don't see any sense in most things you do (Correct me if I'm wrong). I often think the same. There is one thing that carries me through at the moment. It's the fact that there's a God that loves me and didn't let me die yet. That means he still has a plan for me even if I don't know the plan and I don't.
John 3,16
Psalm 139, 16
That belief works for me some of the time, just not as consistently as I'd like. I'm not sure if it's a case of having to rely on it and only it one too many times or what.