And after watching you in last month's KOTH.....
... If that is the case, the best thing to do is use a utility like this one: http://www.metageek.net/products/inssider/. It will tell you what channels the other access points around you are using. Try to pick a channel no one is using, and make the channel as far apart from the other channels in use as possible. The most common channels in use are 1, 6, and 11. I usually try to use 9 if no one else is on it...