I stumbled across author John D. Brown by way of some guest appearances he made at writing excuses. John's got some cool advice over at his website; one thing in particular that struck me was his suggestion to reflect on both your reading and your writing, and keep these reflections in a writing journal.
Uh... oops. I see that I never do any of that. But why not? It's an excellent idea to keep in good form. If I don't take every book I read and every story I write and mince the good and the bad in them, uncover what I've learned or what I've done wrong, and ask how I can use that experience to improve, then why am I doing either?
New rules: I've got a writing journal, specifically to address these questions. Hopefully, this will give me some insight into why I like some of my stories and hate others--thereby allowing me to improve overall.