I tend to quote lines that I like from movies or TV shows if a situation comes up that makes me think of it. For example, any time I have a handful of money and I'm counting the bills, I'll say "You flash this kind of wad in front of some people, they'll kill you for it" (The Jerk), or if I get a good parking space, I'll say "I must be in the front row!" (which, sadly, is a reference to a beer commercial from the 80's)