Work in rounds unless otherwise stated and do not join rounds unless told to. Use a stitch marker to mark the start of a round - a small piece of different coloured yarn placed under the stitch at the start of the round will do. To start a round, you can use the magic ring method, but I prefer (ch2, work 6 sc into 1st ch). If you work the 6 sc over the tail of yarn as well you can use that to pull the hole tight.
Work through both loops of stitches unless otherwise indicated.
ch = chain
st = stitch or stitches
ss = slip stitch
sc = single crochet (US), double crochet (UK)
dc = double crochet (US), treble crochet (UK)
hdc = half double crochet (US), half treble crochet (UK)
BLO = back loop only
FLO = front loop only
tog = together