10 When the dying mad scientist tells you, "throw that switch." Don't! (Walter Pidegeon, Forbidden Planet)
09 Never remove ice from a crashed alien spacecraft with Thermite. (Kenneth Tobey, The Thing From Another World)
08 The call is always coming from inside the house! (Carol Kane, When A Stranger Calls)
09 When the military assures you that there is no alien spacecraft, there definitely is! (Kyle McLaughlin, Roswell)
07 Never, ever, poke a stick into a hollow meteor. (Olin Howland, The Blob)
06 When stalked by a maniacal killer, do not stop to have sex with the cheerleader! (Every Slasher Flick From The 80's)
05 When being chased by anyone, do not run to the roof!(Every Movie Ever)
04 Don't bang alien chicks,no matter how hot. Some have hidden tentacles! (Natasha Henstridge, Species)
03 Turning into a werewolf hurts! (David Naughton, An American Werewolf in London)
02 It's cool to be a vampire! (Christopher Lee-All Hammer Films)

And the number one thing I've learned from movies is,

01 Despite the alien's advanced technology, superior knowledge, and nearly indestructible bodies, a smart-assed, cigarette smoking American can always kick they're asses in the end.

So, smoke 'em if ya got 'em