First thing is to register for a badge now (i.e. register for the Con as a whole).
There are several types of badges available, see the description on the website under "Get Your Badge!"/Register.
A regular badge allows you to register for individual games/events on Sept 1st and allows you to register for 1 "Special" game.
A VIG badge allows you to register for individual games/events on August 1st and allows you to register for 2 "Special" games.
After you have your badge (Con admission) wait until individual events open for registration, on either Aug 1 or Sept 1. Then you will be able to select your events. Most have very limited seating, so select as soon as you can and have 2nd choices ready. Also note Mr. Greenwood is doing a few seminars over the weekend as well as running games. These seminars do not count against your "Special" and have max attendance of 40, much larger and less likely to max out than individual games.
Have fun at the Con, I will be flying up from Texas as well (DFW area).