If a FitBit is a bit out of your price range, you might want to look into a Jawbone instead. This also tracks your motion, steps, sleep and more!! Today only, Best Buy has them for only $29.99 — down from $79.99! That is a savings of $50!!
This comes in various sizes (S, M and L) and blue, black and red. So make sure you select the right one when placing your order. Shipping is free with a $35+ purchase, or you can just try to pick it up at your local store.