Try inserting these movie lines into everyday conversation to spice things up.  They fit into many situations and, when recognized, will bring a smile to the listener's face:

1.    "Scotty, I need warp speed in three seconds or we're all dead" - Star Trek - Best used when people are demanding immediate answers from you to some faux crisis.  Just pick up a nearby phone and try it.
2.    "The Lord tells me he can get me out of this mess, but he's pretty sure Yer F*!@ed" - Braveheart - Tense situations made less so.
3.    "We're gonna need a bigger boat." - Jaws - Translation:  We have a problem.
4.    "Serenity Now" - Seinfeld - You get the point.
5.    "Do you know what I'm doing?  I'm placing my thoughts elsewhere while you chatter away." - Remains of the Day - So many wonderful opportunities for use.
6.    "Mr Takagi won't be joining us. . .for the rest of his life."  - Die Hard - When you are asked where someone is.
7.    "About a nine on the tension scale, Rube." - Burbs - Obscure, yes.  But useful for diffusing tense exchanges.
8.    "That would be bad." - Ghostbusters - So many people say this and don't understand its origins.  So many great lines in this movie.
9.    "I blame myself" - Ghostbusters.  Bad situations made a little better when this is uttered in a deadpan fashion.
10.  "Danny's not here Mrs. Torrence." - The Shining - best said while making your forefinger flex in sync with the words.  Odd, especially in an office setting.

Update:  Execupundit has some great additions.