1. Buy tickets in advance, and in bulk. Several theater chains offer that option on their website, which typically cut about $3 off the cost of each ticket. You can also save by buying tickets at wholesalers, like Costco, where they're selling 2 for $15.99 right now.
2. Use discounts. For instance, if you're a AAA member you can save about 30% off tickets, but you have to call them to get the deal.
3. If you buy movie theater gift cards, you can save about 40¢ for every dollar, which translates to real savings!