Get some fat yarn and a size N crochet hook.
Step 1: Make a slip knot.
Next, flip the whole thing down, onto the longer yarn, see pic 2.
Grap the middle yarn between your thumb & forefinger (pic 3).
Pull the middle yarn out gently (pic 4).
Hang on to tail and pull the loop tight (pics 5 & 6).
Step 2: Begin the chain.
Slide the hook into the loop and tighten the loop around the hook (pics 3 & 4) (not too tight, there should be some give).
Note: I started out life left-handed and am now ambidextrous. I prefer to teach the way my nana taught me because it's how all the books are published.
Step 3: Crocheting the chain.
Step 4: Begin the first row of single crochet
Now catch the yarn in your left hand with the hook (pic 3) and draw or pull it through both loops of the stitch (pic 4). This will leave you with 2 loops on your hook (pic 4).
Catch the yarn in your left hand with the hook again (pic 5) and draw or pull it through both loops on the the hook (pics 6 and 7).
Repeat these steps until you get to the end of the chained row. Then, chain one stitch and turn your crocheted row over.
Here is CrochetMovie2 demonstrating how to crochet to the end of row 1: