Well, think about it this way. Each service, whether it looks useful or not,
actually has a use. if it didn't, it wouldn't be there.
If you want to go stopping or removing services, that is all you, but don't
be surprised when you screw up more than you fix.

Yes, as Chad said, you can get programs like TweakVI, that will allow you do
"trim down" more, but honestly, I don't trust those kinds of programs. If
your computer is stable, and if the Upgrade Advisor gives you the A-OK, then
you shouldn't have to worry about stopping services.
Programs like these are good for more advanced users, but the average Joe,
well lets just say it like this. If you don't know exactly what it is,
exactly what it does, and exactly why it is there. It would be best to
assume it is doing what it is supposed to, and leave it alone.