Start with a template. I have a paper punch that I got several years ago. They don't make this particular model anymore, but there are several available at many craft stores in the scrapbooking section.
Pin a template to your fabric. I pin from the back, or right side so my thread doesn't catch on the pin.
Fold over one side of fabric around the template.
Fold over the second side going counterclockwise. Insert the threaded needle close to the outer edge a tack down the intersection of side one and two.
Continue folding over and tacking down the intersections until all sides have been folded over. Here are two finished hexies. The left one shows the front side and the right one shows the backside.
That's all there is to it! Once you have the hexies basted, they can be combined to create many different patterns. Here's what I am working on....
Happy Quilting!
Bonnie