Just like anything else in this world, to get the best you need to educate yourself and research research research! For about 99% of us, we will not just wake up in the morning with flawless skin. I was never someone with perfect skin but I did become facinated with the idea of it so I went to work on the reading.
In a nutshell I have found 2 sources that will get you the best skin you have ever had, without spending or wasting money around trying stuff out.
First, go to http://www.skintypesolutions.com/home
You will be taking a skin care test. The doctor will tell you which out of the 16 different skin types you are. From there, she will tell you from least expensive to most expensive which are the best skin care products fo you.
Then, go to this website http://www.beautypedia.com/
It is literally an encyclopedia of every makeup and skin care out there. It will tell you how good something is, based on ingrediants, and price. From the list of products the Skin Type Solution lists for you, refer to this online source and see which one is rated as being the best. Just narrow it down!
Use both sites. I actually own the books but the same information is located online. I can guarantee you this will not fail, and you will learn a hell of alot in the process!