A good cooling pad will only cost around $20 unless it is fancy and has a USB hub and a card reader built in or a fan speed controller. I use the Bytecc Aluminum Notebook Cooler. It is the most effective I have seen. The only problem is it isn't meant for the lap. If you travel with your laptop a lot, take a look at this other one, it has a high airflow as well. The only thing is it is quite a bit more expensive.
http://www.newegg.com/Product/Produc...82E16834999336
http://www.newegg.com/Product/Produc...82E16835192013