Take a day trip. Sacramento is centrally located between Mountains and Ocean. If you're adventurous you can see both in the same day. You can see San Francisco, Monterey, Lake Tahoe, Napa wine country, Reno, Humboldt county, or Yosemete all within a 2 or 3 hour drive.
Fondest memory: When I am away, I truly miss the weather. Yeah it gets hot in the summer but the rest of the year it's really mild. It never gets too cold and hardly ever rains for more than 2 days at a time
Visit the Gold Country. Sacramento is located in a rather flat area, being at the confluence of the Sacramento and American Rivers. These rivers start high up in the mountains, here the air is clean and the water is COLD. The Gold Country is part of the mountainous area, including Coloma, the original Gold Discovery site, Calaveras County (of Mark Twain's jumping frog fame) and places such as Columbia, and Angels Camp. Further down the road is Yosemite National Park. Do yourself a favor on Yosemite. Avoid the park during the summer (especially during weekends). See the park in the Spring (enormous waterfall shows or in Fall (lots of color for California) or Winter (you've got the place to yourself...and what a place it is with a snow cover.
Fondest memory: Not actually Sacramento, but traveling to Lake Tahoe and enjoying the breathtaking beauty of the crystal-clear water. The lake never freezes over in winter, and if you go there mid-week, you've got the place to yourself.