I've owned 6 cars in the last 8 years. Not because they've been bad buys - I just have a thing for cars. I endorse the following articles:


How to Buy:

http://consumerist.com/296553/13-step-method-for-buying-a-car-while-controlling-the-sale-and-the-price


What to Avoid:

http://consumerist.com/5069813/consumer-reports-10-car-shopping-mistakes-and-how-to-avoid-them

http://consumerist.com/5022768/6-things-you-should-never-say-to-a-car-salesman


Online service that gives you an accurate idea of how much the dealership paid for the car you're looking at (good for haggling):

http://www.consumerreports.org/cro/cars/pricing/price-service/the-consumer-reports-bottom-line-price-405/overview/index.htm?EXTKEY=AYACA00


Hope those help - give them a good, thorough read-through. They say basically what I would say, plus more - and concisely, in easy-to-read bullet points. :)