How do I find out the speed of my Internet connection?
The website I personaly use is http://www.thinkbroadband.com/ others include: http://speakeasy.net/speedtest/ and http://www.speedtest.net/
Other ways to check: If you have windows 7 if you go to task manager (Ctrl+Alt+Delete) go to performance > resource monitor then the Network tab this will show you your network activity and what processes are sending a receiving data.
Thinkbroadbands broadband guides and tools are also good to have a look at. http://www.thinkbroadband.com/guide/beginners-guide-to-broadband.html