Comment Remote Desktop Support - Showmypc (Score 1) 454
One solution that I've always used and works great is located at showmypc.com. The user you're supporting will download the client (VNC) that will connect to their servers that serve as a bridge. It will give them a code after you download the client that you will type into your showmypc client that authenticates the session. It's very easy to use and works great. I never need to install VNC or any other clients and it doesn't cost me a dime.
Good Stuff.
Of course, LogMeIn works just as well. For the iPhone lovers out there, there's LogMeIn ignition that costs a pretty penny if you're into paying for it.
Lots of solutions exist, it's up to you to decide which one you like best. Hope this helps.