Cetta: I hope you come to enjoy Sacramento. Many people find the following places a great site to visit:
Old Sacramento, and the state Railroad Museum
Sutter's Fort, for a living history exhibition
The state Capitol Building and the hourly guided tours
The Towe auto museum has some interesting relics.
Recently, Hornblower cruises has started a day trip in sacramento that tours the river. I believe its a luncheon. I have not taken it, but this is a reputable company that runs tours all about the west coast. I am sure they have a website.
Numerous other specialty museums abound- Crocker Art museum, California Museum on O st., the old Govenors Mansion, which Mrs Reagan called a firetrap, The agricultural museum in Woodland.
The above is certainly not a comprehensive listing. I am sure others will augment. Others will chime in on how some of these are boring, or a rip-off as well. But the great thing is, you get to decide. If I had to do just two of these, it would be the Railroad Museum and the Capitol.
By the way, Yosemite has its own trip advisor site, as do Wine Country (Napa), Lake Tahoe and other locales near Sacramento. Placerville is a real neat town to visit, (Old Hangtown), we take the nieces there for the free stage rides over Thanksgiving weekend.
Have fun here, and do enjoy the restaurant scene as well. we have wonderful places to eat, many reviewed right here on TA.
dave