I want to keep auto syncing for my music. However, is there a way to not copy all of the library into my iPhone, but keep auto sync?
There are various options to achieve this within iTunes:
You can select to sync only "selected playlists, albums and genres" within the Music tab when you click on your iPhone.
I myself for example have created a Playlist called "iPhone" which is the only item synced to my iPhone.
Another option is to "Sync only checked songs and videos" on the Summary page within iTunes when you click on your iPhone.
Once this is selected only checked songs are synchronized to your iPhone even when you have selected to sync the "Entire Music library".
AAARRRRGGGGHHHH THANK YOU!!!! danged options on the summary pages. how many places does apple have to put the same options that do different things in itunes. what an evil bloody app. Option 2 is exactly what I've been looking for all night. first time Restoring as New since my 2nd gen iphone.
Hold down the 'Apple' & 'Option' keys.
Plug in your iPhone.
Release the keys once your iPod is mounted and has appeared in iTunes.
Next to each song in iTunes is a little checkbox. When you turn on the “Only sync checked items” option, any song with a check next to it will be added to your iPod