I like the idea of exercise tapes - they're also good when the weather's bad too. If that's the way you're leaning, I'd suggest a variety - for example, I have yoga, kick-boxing, aerobics, tai chi, and...shhhhh...don't tell anyone....belly dancing!! Belly dancing is supposed to be very good exercise, but be prepared: the first time I did it, even though I was alone, I felt so silly that I couldn't stop laughing! But it is fun, and hey, you never know when that'll come in handy! ;p