Casting on for two-at-a-time, top-down socks is a bit tricky. You'll need a long circular and a helper needle (a single-point one.
Great Two-at-a-Time Toe Up Tutorial; I love knitting socks toe up, it's easier to fit as you go.
Judy's Magic Cast-On. It's an easy to learn, fast method that starts at the very end of the toe and works the first time, every time. It's completely invisible from both sides, and it can be used with almost any toe-up sock pattern.
Heidi Bears: Two-at-a-Time Socks on a Magic Loop: The Heel Part 2
hand knitted socks - the color pattern is in the yarn - all you have to do is knit, and enjoy !
How to Knit Better Socks: Improving Afterthought (or Forethought) Heels. A neat technique for people who don't like to interrupt a pattern by having to insert short rows.
Be Careful not to Twist! Use Clothespins to Make Joining in the Round Easier. Fantastic idea for the new knitter or when you have an extremely long cast on.
Ravelry: Lacy Cables Knee Socks - A Recipe pattern by Susan Gutperl