These guys put on a good instruction day at Mission for first timers and intermediate drivers: http://www.morrisport.com/index.html
March 30th is the season opener. I haven't been in a year so I'm excited to get my feet wet again.
Pacific Raceways is a very fun track with all of it's elevation changes but make sure you have lots of pad life left. I'd love to get out to The Ridge this year. I've heard really good things about it.