Do you mean keeping them in order while you're knitting? If you number them, they're going to change. Basically you knit sts off the L needle with an empty one in the R hand. Then when the L is empty, it becomes the new R needle and the needle the next st is on is the new L needle. It may be just the first few rows where it may be hard to determine if the sts are twisted, or where they are, but after that it gets easier when you've got more length to the knitting. You could also knit a few rows flat before joining, that would give it a little more body to keep things in order.