If you go to Santa Barbara, figure on a full day. There is a trolley you can ride that is a hop on/ hop off, so you can get a tour of the town, then stop where you want to go visit, including the Santa Barbara Mission. The downtown area is fun to visit, and there is a huge fig tree (really big) by the little train station there. On Sundays, people sell crafts along the beach. There is a restaurant/cafe right on the beach. I enjoyed eating there (
http://www.shorelinebeachcafe.com/).
You might stop off at Carpinteria, if you'd like, and see the seals there (
http://www.carpinteriacoast.com/seal_rookery.html). It makes for a really nice outing. It's about a two hour drive to Santa Barbara. (I go there a few times a year for business (to Goleta).
I did a segment on our Podcast about Santa Barbara, if you'd like to take a listen. I didn't know about the seal preserve in Carpinteria, but plan on going there this weekend to check it out.
Podcast - Show Notes page
Day Six Drive: Santa Barbara & Solvang