The best torrent that I use is Azureus
http://azureus.sourceforge.net/download.php&e=9818
Once that is installed, go to
www.torrentspy.com or any of the other major torrent sites and search for whatever you are looking for.
Once you have found it, download the torrent file and open it with Azureus. it will open and then ask you where you want to download the file. Once that is done, it will download the file
Note: When searching for something to download, try to find the file that has the most seeds. Seeds are people that keep their torrent program open so that people can download files from them. The more seeds there are, the faster the download usually is