I like the Gilmore Girls episode with the flashbacks to when Lorelai and Christopher are teenagers, although it could have been so much more!

The Friends episode where Chandler and Monica are already dating, but only Joey knows. Chandler accidentally kisses Monica goodbye in front of everyone, so to cover for it, he kisses Phoebe and Rachel goodbye, too. I'm laughing now just thinking about it!

I always liked the episode of Friends when they are all late getting ready to go to the benefit at the museum with Ross. Where Monica leaves the "breezy" voicemail and Rachel catches up on her correspondence.