I go in there every few weeks to drool on the Hi-Def LCD TV's and to just generally browse the tech junk. If I really want to buy something, I wait until a deal is posted in Hot Deals and buy it then. Usually I can save like $3 off of a $150 video card with a coupon code, pricematch, and rebate that I get in about 6 months. (sarcasm)
In all honesty, I've bought a lot at Best Buy in the past, but I'm a "wiser" shopper now.