This is my favorite tip for binding. I haven't seen it in any of the books I have so I don't know if everyone already does this, but I learned it in a class and love it.
This is for when you are machine sewing the front side of your binding to the quilt. Before you begin fold over the beginning of the binding to create a clean edge and press it down. Then line up the raw edge of the quilt with the raw edge binding as you normally would. Right sides of the fabric together. Pull back the top layer and sew down the bottom layer a couple inches in. I usually go about 4 inches in. Here's a photo of what I'm talking about.