Ok....

I'll take a shot at this (no doubt someone will improve on it): hold the needle with the last stitch you cast on in one hand (for me that would be the right hand). There should be two strands hanging off the unattached end, a short one (ignore it) and the long one that leads back into the ball of yarn. Holding the needle with the stitch you cast on first in your other hand, take up the connected strand, and knit into the first stitch you cast on. You're on your way!

Georgia

There's videos for knitting a circular item here -

it's the same technique whether you use dpns or a circ. There's pictures and a tutorial here -

One easy way to get started is to knit back across your stitches for one row, and _then_ connect and start knitting around. The little blip at the starting edge can be sewn shut later if you want to.

To make sure it doesn't twist, lay the 3 needles with stitches on them on the table and make sure all the stitches are shoved to the inside of the triangle of needles. Make sure the strand that is coming from the ball of yarn is off to the right, and the stitch it is connected to is at the top right. Then put the tip of that needle through the stitch at the beginning end of the needle on the left (the middle needle is the bottom of the triangle). Now your first connecting stitch is half-made. You can pick it all up now (holding onto the two top needles and let the bottom one dangle) and finish that stitch, tighten it snugly and keep on knitting around.

Good luck!

=Tamar

What I should have said was put the tip of the fourth needle through the stitch at the start of the left needle.

A more secure way would be to begin with somee stitches on all four needles, with only a few on the fourth needle.

I've heard that another way to connect the stitches is to cast on all but one of the stitches you need, slip the first stitch purlwise onto the place for the last cast-on stitch, and then cast on one after it. Start knitting with the first stitch that is still on the left needle.

=Tamar