Excercise Bike

So I'll be getting an exercise bike on Friday and I'm just looking for some ideas of what type of workout to do. Should I just do steady cardio, or maybe try some intervals?

Anyone using an exercise bike as their sole means of cardio?

This bike isn't fancy by any means, looks like and old...

Source: http://weight-loss.fitness.com/weight-loss-through-exercise/50935-excercise-bike.html

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