I've found these books invaluable when weather (or dinner) keeps the kids indoor.
The best thing I learned from these books was to have a busy can where you list on 3 x 5 cards things your kids can do without supervision so you can get something done and not turn on the TV babysitter. You can even let the kids decorate the can so they can have ownership of it. The other idea that I thought was great was a traveling bag that has things your kids can do in the car.
Go check these books out...you won't be sorry :)