I think all of us know how to use Team Viewer but for people who don't know here is a video I found from YouTube.
I didn't want to use Team Viewer but because of Herath I started to use Team Viewer. (I thank him for telling me to use it)
It is easy actually but at that time, I didn't have anyone to share my desktop 
and to help me for my problems that I got and then he helped me via Team Viewer after that I started to use Team Viewer to help my friends and for some other works. Enough talking about me
Here is the video about using it. [media]http://www.youtube.com/watch?v=ZOWl4FyENAM[/media]