When I posted about sending all the items to my friend "way up north" I decided to not include info/pictures about the actual items since the post was getting too long. So I'm going to do that now. Much of what I'm going to show has to deal with how to stretch out your yarn when you're dealing with finite amounts, for whatever reason.
For this purple and grey scarf, I had a lot of grey, and the the purples/white/black added up to 1/2 of what the grey was. So I knew I could do 2 rows of grey, 2 rows of another colour (and be left with lots of grey). I did the "other colour" sort of random. It was a 4 row tuck stitch pattern, and then 2 rows of knitting all stitches. There were a couple purples that I had very little of, so I used them when it was a non-grey 2 rows all stitches spot, so they would show up more. I carried the grey and one purple up one side, and the white and black up the other side. For the other purples I did cut the ends. I also put needles out of work to allow for a looser feel and slightly wider scarf.
The main idea I want to present is to weigh your yarn before starting. If you have equal amounts, then you can do equal size stripes (they can be unequal in the sense of 2-A, 4-B, 4-A, 2-B). If you have double of one colour compared to another, plan accordingly. Use the smaller amount for a band, or thin stripes. If you want to keep a variegated yarn looking saturated, stripe it with a contrast yarn, or with one that matches identically. If you want to soften a variegated yarn, blend it with frequent rows of a matching colour. One row of each will blend very nicely.