To form a tube, work a foundation chain and slipstitch into the first chain to form a ring. To work, single crochet around, chain 1, then work one single crochet into each chain stitch around. When you get to the end of the round, you can work in the spiral-fashion or treat each round separately.
To work in the spiral-fashion, you continue to work in rounds without a slipstitch to join the rounds. When you finish your first round, you begin your second round. It’s a good idea to place a marker at the end of round 1 and move it up with each new round to keep track of the rounds completed.
To treat each round separately, at the end of the round join the last stitch to the first stitch of that round with a slipstitch. Before beginning the next round, work a chain 1, then continue to work around, closing the round by working a slip stitch into the first stitch worked at the beginning of the round.
The second method of working in rounds is to obtain a flat surface or motif. Shapes most commonly found when using this method are circles, hexagons, ovals, and squares. These shapes are formed with increases spaced out in the piece, or places one above another.
To make a circle, chain the desired number of stitches and form a ring by slip stitching into first the chain. Work the first round directly into the space formed by the center of the ring, not into the chain stitches.
The trick to a perfect circle is to not place your increases in the same spot.
We are going Round today :)
This was just one more tip taken from the "Official Guide to Crochet"
http://www.officialguidetocrochet.com/specialHappy Crocheting...
Everything We Know about Crochet is in this!
