5. Leave A Pair For Someone Else
So you've been clicking refresh on that new pair for a half-hour now and you finally got through and your size is gone. So is the next size up and the next size down. But they're not completely sold out yet, and while the last size left won't even come close to fitting, at least the resale price will help make up for the time spent. And hell, no one would have left your size for you. Right? Right.