Once I went to a Blockbuster and rented a movie based on how cool the cover artwork was, I still remember the title, Evil Lives. This turned out to be one of the worst B movies ever to be produced in history and amongst my friends I was banned from choosing movies for months.
Don’t let this happen to you. Go to VidSmack.com and watch the previews of these movies to see what you are getting into before you make that trek to the theatre or to the video store. VidSmack is a search engine specifically for movie trailers. Simply log on to the website, punch in the name of the movie you are interested in viewing and VidSmack will direct you to the trailer, usually directed through YouTube, the search is surprisingly accurate and includes foreign films as well.
VidSmack.com In Their Own Words
VidSmack.com
Movie Info and Video Trailer Search
Search over Millions of Local & International Movie Titles and Video Trailers
Why VidSmack.com It Might Be A Killer
This is an excellent time investment to make sure the movie seems to be of your liking before you round up your friends and drop $10 a piece at the theatre or waste a few bucks at Hollywood video and a few hours of your life.
Some Questions About VidSmack.com
For the most part you can easily just go to YouTube and find this same information by typing whatever movie you are looking for and trailer after it, anyone with any searching skills can easily bypass this site. 
