Drawing the Line

I've realized lately that I've come to a decision I've had to make before. That decision is: How hard do I really push myself?

I've had a love/hate relationship with work pretty much throughout college. Mostly hate. But since I'm mostly supporting myself, I really need to work. All of the jobs I've had involve standing on my feet, which, of course, begins to affect my back. Most of this school year, I've been struggling to make it through over 4 hours of work without some sort of pain. This week, especially, has been tough.

So, how much should I really work? How much is too much? I'm pushing that limit right now, and I have a feeling that I'm about to find it again. I've been at my limits before.

So, as I go in for an 8 hour work day, I guess it's something I'll really have to keep in mind. I've picked up several extra shifts already, and I'm considering more. I know certain people will tell me not to push myself, but I hate being indebted to someone else. I want to be able to live somewhat normally, and I guess that's a big reason I'm having surgery.