One of the best parts about owning a notebook is collecting the latest and greatest add-ons to enhance your computing experience. It's even better when those add-ons don't cost more than 50 bucks. Here, we've herded together ten accessories, from webcams and VoIP phones to sleeves and power adapters--practically one for every port on your notebook--that'll cost you less than dinner and a movie for two. So stay home tonight, read this roundup, and discover which dirt-cheap add-ons you can't live without.