1. Gotta see it at the theatre-I'm willing to pay $15-20 (ticket and snacks) because it's a movie that has to be seen on the big screen. eg. The first Star Wars,
2. I can wait for it to come out on DVD. This includes the vast majority of movies spewing forth from Hollywood these days,
3. I'll wait till it's shown on HBO. See #2,
4. I'll catch it one night on WTBS,and
5. Joel and the robots will tear it to pieces on MST3K one day.
There's also a rule of thumb re:your average flick these days. A mediocre movie can be made more tolerable with vast amounts of gratuitous nudity and sex. If it can't, you've got a REAL bad movie. eg. Showgirls, so bad Bobby and I yanked it out of the player and watched To Wong Foo...instead.
MST3K is no longer in production, but check out some of the bad-movie snark review sites (jabootu.com, agonybooth.com).
I do miss MST3K. The SciFi Channel killed it. I wish I had the where-with-all to have my own cable channel where I could buy all the shows that were good but weren't given a chance to succeed.