Here's some good basic instructions.
http://yarngear.blogspot.com/2008/02...h-pattern.html
I would do one of these as written and when you understand the way it's done you can take this idea and alter it to suit your needs. For instance if you don't want the eyelets you can do other increases instead of YO. You can do a design in the middle, a pattern stitch or whatever. This is a popular design for baby blankets and dishcloths.