So I've had my D90 for several months now, and haven't had the chance to go out and actually shoot for artistic or technical purposes. Most of my shots so far are just snap shots for group events, nothing I couldn't do with a point n shoot. I hardly ever shoot RAW, as I really don't need to for the stuff that I currently shoot. I've shot a few of items like guns, knives, stuff for sale, etc, but again nothing too awesome. So do you guys have any tips on getting serious into this shit? Spots to hit up in SoCal, additional gear to buy? Currently, I've got the D90, 18-105VR lens, SB-600 flash, 3 spare batteries, one 8GIG card. What additional items are must gets? I'm currently in the market for a nice tripod since my cousin took back his Gitzo.