Better When it's Free

If you are a Bank of America cardholder you can get into museums free the first weekend of every month. Go here to find participating museums. If your state's not there at least keep it in mind for traveling (plan your vacation the first week of the month). If you visit the websites for attractions you can often find free and discounted days. That's how I got into the puppet museum and kids' museums free.
Know of any other freebies or hot deals? Share!