The 89-year-old screen legend shares advice on how to stay young on Letterman

At age 89, Betty White knows a thing or two about staying power. White made her comeback by starring in one of the most talked about commercials of the past two years, which made her the subject of a veritable Facebook frenzy. Then she wowed audiences by breathing life back into last season's Saturday Night Live premiere. Now she's racing through movie and sitcom appearances with the unbridled energy of a performer a third her age.

So what's the secret behind White's revived success? The actress appeared on Monday night's The Late Show with David Letterman to impart her advice in the form of a Top Ten List, which included such gems as "try not to die" and "stop watching this crap."

Watch the video here: