Check this site
http://www.branson.com. It gives you a good idea which activities are there.
If you want to spend 1-2 hours for a timeshare presentation, you can get up to 2 tickets for 2 shows plus a dinner voucher. Look for signs selling Show Tickets.
In addition to the shows, shopping and Silver Dollar City, I can recommend a visit to Dogwood Canyon.
E-mail me with your interests and I may be able to give you suggestions.
It is now dual highway all the way from Springfield to Branson, so it will be easy to visit Springfield while you are in Branson.