90% of the time I do "Buy It Now" as well, but I've won a few auctions thru bidding, even recently.
It seems that the key to winning bids is to get buyer's remorse(or should that be "bidder's" remorse?

) after placing your bid and then kinda hoping that you don't win. Then you're sure to win.

That's happened to me afew times. The biggest one was when I was
kinda looking for a DSLR camera and I placed a bid on an Olympus E-500 and I got a bad case of remorse after bidding. I ended up winning but got a great deal on it.