Think of it like this:
Make sure you cast on the right amount of stitches for a start. Now recount them to make sure
When you join in the round, make sure it's not twisted place a starting marker. Pearl one round.
Then use safety pins as markers because then you can just count stitches, place marker, count more then place marker rather than remembering to place while knitting. (remember you place them on the needle not the yarn or anything).
Double check to make sure you have the right amount of stitches between each marker.
Now is the easy bit! No more counting
OK so the rows go knit one row, purl the next. Every pearl row is just plain ol purl. Every knit row you're going to increase before and after each marker. SO just keep on knitting and when you come to a marker, knit front and back, slip the marker and then knit front and back again in the next stitch.