Do all the maint at the dealer? F that. The dealer's not going to void my warranty because I change my own oil or perform my own service.
Having said that, I have an excellent relationship with my dealer...and the work that I've had done there has been top-notch. I just got two wheels replaced (warranty - were gouged off the truck), and the balance and rotate is perfect. The car just glides. I didn't think I'd even notice the difference because there was no vibration I could detect, but wow.
They did all that for free too...just because the wheels were on backorder for a couple months.