Here are a couple sites that may be helpful to you.... I usually cut my bindings 3 inches for larger quilts and 2 1/2 for smaller ones and for table runners and wall hangings. I cut either straight or cross grain for mine. I double fold and place the cut edge along the quilt edge, stitch it all the way around and join it, then flip over and handstitch to the backing.
http://www.quilterscache.com/StartQuiltingPages/startquiltingfive.html
Start Quilting 5 - Binding
http://www.quiltwoman.com/hints/EndlessBinding.pdf
EndlessBinding.pdf (application/pdf Object)
http://www.quiltsmart.com/Pages/completing_your_quilt.htm
Quiltsmart 101: Completing Your Quilt