But…but…… wait!
I thought the game was dying! :p
Seriously, assuming you are in North America, your best bet is to stay up into the early hours of the morning (when it’s around 1-3 am in the Central/Eastern seaboard area).
Sadly this won’t help as anet confirmed awhile ago that the amount of accounts bound to a server sets the server population status and not the current amount of logged in accounts.
So basically until either anet changes how this system works or people transfer servers no one will be able to get onto a Full server regardless of the time they try.