Increase Your TCP Connections : Normally windows Restricts you to use only 10 TCP , to provide security to your Pc's . You can increase this 10 to about the range between 50 to 100 . For this you need to install this patch .

Port Forwarding : Every Ip address is divided into different Port Numbers .Each application use different Port number . You should have a separate port for your Torrent dowloader to download . So that you need to Forward your Port to download . Follow these steps 1] Goto 2] Select Your Modem , from the list given in the site . 3] Now select the Torrent Application 4] Follow the Steps given . Minimising your Upload Limit : Your upload speed will be defaultly set to maximum . So you need to decrease it to enable more downloading . The ratio should around 80 : 100 upload limit .
~If you have Bittorrent Client READ THIS to optimise your settings .
~If you have BitComet SEE THIS
Disable Windows Firewall : If you use Windows Firewall disable it and go for some other option which is P2p friendly ! Because Windows firewall hates the P2p connections . Queuing Settings : According to the download speed , you can limit the number of torrents you download . For example , If you have 256 kbps , the normal limit of torrents will be 5 . So decide how many you are going to download , you can download multiple small files , or some few larger files at the same time !