If I were you, I'd just check it every hour, once per hour. Any more than that and you're going to feel disappointed. Let's not ask simple questions or ones that really aren't necessary so they can focus on any problems/issues that may arise from the MASSIVE influx to the servers today. The faster things can get resolved, if anything were to occur, the faster more and more people will get in. We ALL will get in before the 20th, just have patience, we'll be playing soon enough.