is that they need to be installed on the remote machine as well as your own, so when you say "I would like to be able to help people remotely" I'm wondering just what you mean.
If you mean that you want to run a commercial venture offering remote computer problem solving you'll need to use a custom designed software solution - one that works by downloading a small applet to the client's machine and enables you to take control of the remote desktop. There are some pretty sophisticated software solutions available, some of them include automatic queuing systems for waiting customers.
Take a look at this, but be warned - you'll have to pay around £700 a year in advance.
If your customers are running Windows XP or Vista you can of course use the built-in remote support faciliity.