star, i meant to ask, how long have you been going to IW? and how early do you buy your tickets?
I went in 2000, and I've been going ever since. I renew my ticket during the tournament. I got my current seat 4 years after I started going. It's a really good seat.
If you want tickets for single days, I think they usually go on sale around October or November. The site will say when.