I do a fair amount of stripes between my endless attempt at a Doctor Who scarf and various Harry Potter beanies. One difficulty for me has been getting the stripes NOT to jog out on me. Here’s a great tutorial from WEBS:
When knitting stripes in the round, a jog is created at the color changes (bottom arrow). This is because knitting in the round is actually knitting in a spiral. One row is not neatly stacked on top of the other, but instead a spiraling continuation of the previous row.
To avoid the jog created by changing colors during striping:
Read more at Webs Yarn Store Blog