daBOODA - if you're shooting something, and think the WB will be thrown off, or you think the exposure could be off (or you just always want the best quality possible), can I suggest you shoot RAW? That way you set the White Balance yourself, and can experiment after the shot is taken.
With regards to fill flash, if all you have is the built in flash, then yeah, just pop it up, and let the camera do the rest . To soften hard highlights / shadows from it, Lumiquest do a diffuser for built in flashes (the soft screen) - it's only 9.99, but haven't used it, so can't comment on its effectiveness - though it's not expensive, so is probably worth a shot
I still have loads to learn, but for most people, composition is the hardest - the rest is a matter of practice, (and remembering what things to be paying attention to).
Looking forward to seeing some more of your shots .