I went on an awesome 80's movie binge recently. Almost anything with: John Candy, Bill Murray, Harold Ramis and/or Dan Aykroyd. I like to download a bunch of movies by one actor, then as I'm watching those I see other actors I really like, and then I go and download their movies, haha. And it goes on like that, actor by actor... Steve Martin.. Chevy Chase... tons of good drug-fueled hilarity came out of 80's comedy... Airplane comes to mind now too.
So here's a quick list:
John Candy:
-Planes Tranes and Automobiles (Bonus: Steve Martin)
-Summer Rental
-The Great Outdoors (Bonus: Awesome performance by Dan Aykroyd as narcissistic brother, barely recognized Annette Bening as his wife)
-Delirious
-Spaceballs
-Uncle Buck
Then since we mentioned Dan Aykroyd,
-Ghostbusters (Bonus: Multi-brancher including Harold Ramis and Bill Murray!)
-Stripes (Since we mentioned Bill Murray and Harold Ramis--also has John Candy, forgot it above!)
-Coneheads (90's technically, oops--but, bonus: Chris Farley!)
And since we mentioned Steve Martin:
-Leap Of Faith
-The Man With Two Brains
-The Jerk
-L.A. Story
-Bowfinger (Bonus: Eddie Murphy)
And since we mentioned Eddie Murphy:
-Beverly Hills Cop 1-3. (Which has that guy that plays Balky Bartokamus!)
--and it goes on like this. This is a pretty effective way to find new movies... and, obviously, if you don't know what else someone's done, google it.