After shooting a while on film and now digital, I've found that I dig shooting in natural/available light. I've also come to the realization that I'm not great at it. Here's an image from the other day: I like it, but it just doesn't pop. What do I need (other than more experience, skill, and basic exposure knowledge) to avoid having to use fill flash? A reflector I'm guessing, but what color/size and all that jazz is best for shooting people? Thanks for any help guys.