If you ever find yourself on "Who Wants to be a Millionaire," don't use your "Ask the Audience" lifeline for anything that has to do with history. Or geography. Or literature. Or anything, really, except for television, movies, and the most popular of best sellers. Because otherwise they don't know and they will guess wildly.
Also, when you "Phone a Friend," make sure he or she knows how to use Google efficiently. And isn't hard of hearing. And can spell. And can use Google efficiently.
Also, if I'm ever a contestant's Friend Who May Be Phoned, I'm going to answer the call with a crisp, "Lifeline!"