(The other side is just he exact reverse of this side but I can't get it to photograph so well as all of the blue is replaced by yellow and looks VERY yellow in all of the photos)
1) Just as in normal fairisle knitting, pick a hand for each color and STICK TO IT (whenever I am teaching anyone anything in knitting, I cannot say enough times that consistency is the most important thing) — I have been using my left hand for the yellow and my right for the turquoise.
2) The left hand should knit Continental Style while the right hand knits English Style (throwing)
3) Each 2 stitches should be viewed as single stitch, with the purl (or the knit) always first and the knit (or the purl) always second
4) (This one is directly related to #3) — the stitches should alternate kpkpkp all the way across — in other words, unless you are crazy enough to try a stitch patter in combination with the double knitting, there should be no two of the same stitch type in a row
5) Purls are the opposite side from that which you are working on and knits are the side that you are looking at — in this way you will be knitting both the front and the back at the same time — purls for the "back" and knits for the "front"
6) MOST IMPORTANTLY: Bring both strands to the front to purl, even though you'll only purl one of the strands and bring both strands to the back to knit even though, again, you'll only knit one of the strands. This prevents twisting.