Have you got the warranty / maintenance booklet? Maintenance details - it's all in there. (It's the thinner book in the package that you should've gotten from the dealer.)
Alternately, I think it's also on the Subaru website.
Short answer: oil and filter change, inspections, lubrication. Fluids and tire rotation if necessary.
EDIT: only exception would be if you've got warranty work that you want to have the dealer perform or look into. For example, the squeaky seat issue, or if you've got the e-mail (letter) regarding the engine control module.