Good point. I know I'm guilty of having lost sight of the original problem.
It's simply a matter of self-discipline and realizing that if you're to get certain things from life you have to give certain things. Time invested in school = a job and salary. I know when I was in college in my 30s I stayed self-motivated by reminding myself that I never wanted to be dependent on another person for food on the table again. That desire kept my nose to the grindstone.