1. take a day trip on a loop through Abiquiu and Ghost Ranch riding through Georgia O'Keefe Country. 2. the Native American ruins near Los Alamos (Bandelier National Monument). Taos is another day trip. Although the distances seem great, the roads are fast and the scenery is so beautiful you won't notice the distance.
Lots of great resturants in Santa Fe. What type of food are you into? If you take the advice in the other post and go up to Los Alamos, stop at Gabriel's Resturant on the way back. Make sure you get the guacamole. It's made fresh tableside and is awesome.