So many of mine have been mentioned already! Some others:

-Wayne's World - how can that be forgotten?
-The Real World-Chicago (from 1996, with Bob Dole as one of the roommates!)
-Bad Idea Jeans - "Normally I wear protection, but then I thought, "When am I gonna make it back to Haiti?"
-The SuperFans. "Daaaa Bearssss!"
-VH1's Behind the Music: The Super Bowl Shuffle. :)

Kristen Wiig has given me whole new generations of quotes....

"Don't make me sing."

"Thomas! Oh, Thomas!"

and

"So, kind of better than you, soooooo....."

Being my favorites.

My husband will never let me live this one down - I actually said the same thing once!

Can we ever forget the Bass-O-Matic?

"Hey, hey - we're Adobe! The little car that's made out of clay!"

Basically, any of the commercials...

"Colon Blow and youuuuuuuuuu!"

The Love Toilet

Handi-Off and Toe-Riffic...

The whole lawrence welk show skit was my favorite.

"With my, by myself".
"I found a dead cat on the side of the road so i took it home and i cooked it and i put honey on it and i ate it is that bad to do do do do do do do do do"

OH and of course,
"say hi to your mother for me"

LMAOOOOO

"And I like can I touch"