Sounds weird but i personally go out normally, if possible i try to open one or two sets in fancy dress(like low levels 4-6's) and steal a bit of fancy dress they never mind, so far ive racked up:
-2 pairs of green neon sunglasses
-1 pair of raybans
-a glittery cowboy hat
never wore them out again their in my room collecting dust but they make real set pleasers on the night, rarely have to open a set!