When you come to a new section of the pattern or a new technique put in a life line
. A life line is a piece of yarn, or thread that runs through the the stitches just before the new section. This line is in addition to the yarn being knit and is left in place. If you have to rip out stitches the life line will stop the ripping and make easier to pick-up the stitches.
It is easier to pick-up the stitches with a needle smaller than the one you are knitting with. Then knit off the smaller needle to continue.
Also, I am amazed at the instructions that mysterious appear on the second and third or fourth reading of a pattern. I want to know how these extra instructions are inserted after I print the pattern.