After you have chosen your client, you now of course have to endeavour into BT file-sharing,
on the bellow trackers, you will be able to find huge selections of .torrent files you can download
with your BT client and run in order to create a peer-to-peer link and acquire your file.
You'll find the best stuff at private trackers, these sites are invite only usually, you need to receive an invite from someone on the inside to gain membership,WARNING You are not allowed to ask for invites at AfterDawn.Com.
Stick with public trackers (for now) , the list of them goes on really, once you've installed your client, just search for what you want in any of those sites and download the .torrent file, TomMelee's BT Bible will weed out any other answers you need, it explains everything you need to know, you can download his guide from here:
That should cover everything needed for you to start using BT, theres plenty of other torrent guides and good threads regarding BT and other means of file sharing:
