We are big movie watchers, but we refuse to pay $4 or more for a couple hours of watching. We usually watch on average 4 to 6 movies a month. Here's how we don't pay for them (hardly ever).
We rent from either Blockbuster or Hollywood Video. We use cashback bonus rewards from our credit cards to get free movies. Discover has rewards for both. Hollywood Video is a better deal. Only catch is that you can only use one coupon per visit. That actually limits us and is good. We used to go and rent two or three at one time spending a lot in one visit.
I joined eRewards.com and do short surveys. I got an invitation from Northwest Perks to join about two years ago and its by far the only online survey deal that seems legit. You earn money and can cash it in for magazines, reward points, coupons, etc. I cash in my money and can get up to 12 movies a year at Blockbuster. That is one per month. We also get gift cards to rental stores as gifts.
We borrow movies from the library for free. When we lived in Minnesota they charged 50 cents for DVD rentals, but where we are now there is no charge. I got three movies the other night that we wanted to watch -- Sideways (the first movie we ever watched together), Proof, and Manufacturing Dissent. Had I rented at Blockbuster or Hollywood Video there would be $12 out the door. That's $12 that I can spend somewhere else.
That's one of our money saving tips. Why pay for something if you don't have to?