Though I never walk out with a find, I still love coming here every once in a long while to participate in the chaos. I clearly have not trained enough to shop here. I always miss the best picks. Evidence has it when I'm admiring all the piles of great stuff others' have in their baskets already.
I'm not sure there is really a good time to come here. It's always super busy, even on weekdays.
If you have time (and you will need time), I've learned the best strategy is to follow the store replenishing crew around so you can be first in line when the fresh inventory is laid out. You'll notice there will be mini-lines forming throughout the store and sections that are temporarily closed for the crew to restock. Competing against the pros will be tough but be strong and find those Choos you've been looking for (at a great price).