I like Robbie Ventura's Vision Quest DVDs. Some are hard (Race Day, Climb, Power), but Speed is a good one to start with (along with the another one, but the name escapes me). He's very encouraging and actually takes you out on the road, so it's not dreadfully boring! I personally cannot sit through a Trainright dvd or most Spinnervals (but that's just me and my tendency to get bored easily on the trainer).