as far as accepted "rules" no hose with open toed shoes. no white at weddings. show off boobs, body or legs but never all three. my belt and shoes must match and i prefer my bag to be either a bright color or match as well. underwear should never ever show...even bra straps with tanks or thong tops when you bend over. ew. i don't usually wear white in the winter...but i don't wear it in the summer either. i personally have a rule that if it fits, is comfy, and flatters buy 5 of them. i also wait for a trend to be around at least a year before i give into it. it's turned into a semi classic by that point imho.