How Should I Not Plan My Class?

This short post by Shelly Blake Plock has been on my mind since school let out. How can I not plan my class better? It ties into the post about Girls in Technology too. I want to make my class more student-centered and problem-based. I already teach the majority of my class as problem-based, but currently I create the problems for the students. I am thinking of ways to get students involved in creating the problems themselves.

Problems are supplies, unmotivated students,