the best advise i can give is...
if you don't mind to wait for a pcb in the store, then wait till coops finish so the boards show up.
if you really want to get in on a coop, then you gotta pay attention. at least log on once a day. you might as well participate in the discussions while you're on. For example, i try to log on when i can, because sometime in the future there will be a smart string coop. it might be a couple days, or weeks, or even a couple months. but it's something i want in on, so i just gotta keep checking.
as a side note for those that can't get in on a express coop. there seems to have been one each month, and i have no idea if there will be another one for April, but fyi, it's now another month.