I'm a relatively new knitter, and just started my first pair of socks last weekend. I'm using a free pattern by Sand and Sky. Because I knit like I cook, and need extra patterns to figure what I can change, I also checked out patterns by Knit Picks and Yarn Mountain. What I like about the last one is that it give links to youtube on how to do some of the steps that I haven't tried before. All three patterns I've linked to are to very simple socks that you can make as long as you want (or have yarn for). Ravelry has a good system for search patterns, if you have different sized yarn and needles.

I'm in the middle of the foot for my sock, so I haven't attempted a heel yet.