Striped socks (two colors)

How to knit striped socks (with two colors) to match row on row? When I want to join first and the last stitch of the same color they don’t match (one is always above the other). I know there is a trick for that (I read it few months ago) but I forgot what I have to do. :wall:
If somebody… anybody… has a link please post it here.
Thanks!

Knitting in the round creates a spiral which is why that happens. Here’s a few links to try the jogless jog.

http://charmedknits.blogspot.com/2007/06/jogless-jog-up-close-and-personal.html
http://www.socknitters.com/kickback/joglessjog.htm
http://nonaknits.typepad.com/nonaknits/2004/12/jogless_stripes.html
I haven’t tried this, but here is another method.

Jan in CA, thank you very much!
The last link you posted was that one I read few months ago.