Startup Services safe to disable
want to speed up your phone/save battery life?
get an app such as Autostarts or Startup Auditor, and disable the green services. stay away from the red ones.
Google Partner Setup
Network Location (if not using apps which need geolocation regularly. ie. Gmaps, GeoTag, etc.)
Bluetooth Share (if not using BT device)
Email (if not using email service other than Gmail)
Messaging (if using 3rd party sms app, ie. Handcent SMS. or if infrequent texter)
Calendar (if calendar is not used regularly)
Calendar Storage (if calendar is not used regularly)
Voice Dialer (if not used)
Google Talk Service (if GTalk is not used regularly)
Maps (if GMaps is not used regularly)
System Updater (not sure about this one)
My Uploads (not sure about this one)
Download Manager (not sure about this one)
please note that disabling the services does not mean you wont be able to use them, it just means they wont startup when your phone boots. disabling anything that is used regularly will actually slightly slow your phone down as it has to start the service which would by default be already on.
if you have any other services listed in your startup manager that i missed, its because it's a 3rd party app and not a system component. use your discretion as to keep or disable it.
also if im wrong on anything, please let me know.