Bittorrent - How to be sneaky?

I was wondering if there was any way to cover my tracks when using bittorent (and other programs?), so that some techy fanboy would never be able to tell that I used bittorrent an hour ago.  Or at least have a harder time.
I don't know how this stuff works :/

You are stupid. Bittorrent connects to everyone it can find. If the 4chan Party Van is outside with a 1.2gb copy of "CP party mix" you're going to connect to them and be like "HEY GUYS I WANT TO DOWNLOAD THIS FROM YUO HERE IS MY IP"

Then you're fucked