If you're into registry tweaking here's a very helpful tool.
Windows 7 Services Registry Files and Information
You download a registry patch for "safe" or "default" services configurations. He has all his tweaks listed on the page so you can see what's disabled and what not.
You can also create your own services tweak here
Windows 7 Custom Services Registry File
Just select the pertaining OS towards the bottom of the page. Any changes can be easily reverted back by installing the "default" services patch.