If Cali folk try to tell you In 'N Out Burger is any good, don't believe 'em. It's disgusting.
If you've got an extra 5 grand just lying around, maybe you can get yourself a nice little painting at Carmel by the Sea. Lol.
Monterey Bay Aquarium is awesome and worth seeing.
And driving on Highway 1 south of Carmel along the coast... pretty breathtaking views.