There is a useful and easy way to avoid those 'bands' of differing colour hues sometimes found in hand dyed yarns within the same dye lots on finished worked panels.
With this method you also do not have to worry about purchasing yarn from different dye lots because you so badly want the yarn!
I find that using 3 skeins of yarn at the same time diminishes this problem entirely... big yay!
At the beginning of each new row, simply pick up the yarn of a new skein. There will always be a thread available on each side of work, Rs and Ws, and the loop created will only be one row apart and easy to deal with when seaming.
Use the yarn from the centre of the skein to avoid balls rolling around. This method has an added bonus of less threads per fabric length to weave in after completing a panel as you are elongating the length between ends by a third!
What to do when coming to the end of your supply of skeins? Before starting a new skein which is possibly the 2nd last in your stash, rewind off as much as possible to add another skein to work with. If you are like me then this will give your hands some time to rest inbetween knitting too and is not too bothersome to do to ensure an even distribution of dye lots and colours... Voila!