Have enough money, to not worry about having enough money

I just want to have enough money that half my paycheck doesn’t disappear when the rent is due. So maybe I could buy a new pair of jeans. I also need a table to eat at, which I also can’t afford. Right now the job I have pays enough that after bills I have just enough left for food and going out and almost nothing else. So it’s not like I want to be rich, I just hate the way I grind my teeth when I realize I’m going to have to get through three weeks with $200 and no food in the fridge whatsoever.
Also, I’m in debt because of college. I would like to not have that hanging over my head and sucking up my money anymore either.