The Bulls are offering a presale of tickets on Sept. 29, ahead of the general public sale on Oct. 1, to anyone who signs up for the myBulls email newsletter.â†µ
You can do that here. Details:â†µ
This is your exclusive opportunity to buy Chicago Bulls tickets before they go on sale to the general public. Your presale begins on Wednesday, September 29 at 10:00 a.m. and ends that same day at 9:00 p.m. You can guarantee yourself seats to the most popular games before they are sold out.â†µ
There are a couple of other methods listed on that page, but the email newsletter seems to be the easiest one.