I synced some of my music from itunes to the my iphone but none of the playlists synced, how do you sync the playlists? I selected a playlist and clicked "Autofill", it loaded the songs but no playlist
Did you set the iPod up in manual-sync mode? If so, then you simply drag and drop playlists to the iPhone while connected to iTunes. Note that if you're using manual-sync mode, you can't take your iPhone to another iTunes library without it being erased, unlike all other iPods in manual mode.
If you're auto-syncing the iPhone, then you either sync everything in your library, or you auto-sync to selected playlists. If the latter, then its just a matter of connecting the iPhone to iTunes, clicking on the Music tab, then selecting the playlists you want loaded and then click Apply.
Check out the Help! section above for many Tutorials on syncing and managing your iTunes library.