Tires tires tires...

Everyone who knows me more than 2 minutes would know that I'm totally lost when it comes to cars. So imagine my headache when I found out that I have to change the tires on my car. First of all...I have no idea how to judge which tires are good, and secondly, I have no idea what's cheap and what's not when it comes to tires and tire services. So...just gonna trust the "Always Low Prices" slogan...Wal-Mart, here I come! :D