This makes a tighter beginning round than when you begin with a round of chain stitches. Take yarn and make a loop with end to the left and side closer to the ball crossing over it:
Now begin a round of 5 sc by inserting hook into the magic circle:
Yarn over and continue with a single crochet by pulling the yarn through both loops on your hook. Repeat 4 more times and join with slip st to make your first round:
It looks like the ch 3 round with 5 sc around it, as shown in this post: http://wp.me/p51ZSQ-1f, but it is much easier once you get the hang of it.