My family and I purchased America's Historic Triangle Ticket which allowed us entry into Colonial Williamsburg along with Jamestown and Yorktown facilities for seven days. Unfortunately, we could only visit for a short time. I wish our vacation had been longer.
The ticket agent at the visitor's center gave us a map of Colonial Williamsburg and told us some of the things that were happening the day we were visiting. I wish more stuff had been opened. It seems that only a few venues are open on certain days. Some places that were open made us wait until the people ahead of us had cleared out. Other things we wanted to do (Carriage Ride, restaurant) were already booked for the day.
We did get to visit the Courthouse, the African American Religion Exhibit, the Armory, the Joinery, the Capitol, and the Governor's Palace. All of us thought the Capitol tour was the most interesting. The historian did an excellent job. At the Courthouse and the Governor's Palace we had a hard time hearing because of the acoustics.
Overall we enjoyed are visit (except for the hot and humid weather). The Triangle ticket is worth it if you have multiple days to visit. If you are only visiting for a few hours, I would not bother with any tickets and just walk around taking in the atmosphere and talking to the actors who are walking around the town.