Depending on how big the quilt is I use two methods. For large quilts I add a sleeve before the binding. Makes it very neat and only one seam to be hand tacked down. For smaller quilts -
I cut two squares half the size of the width of the quilt.
I press them in half to make two triangles.
Place each triangle in the upper corners of the quilt with the raw edges to the outside edge of the quilt.
baste stitch the raw edges in place with an 1/8" seam.
Add your regular binding.
Now you have triangles in the upper corners which look like upside down pockets.
Measure the width across the quilt from just inside the finished binding and cut a piece of sturdy-ish cardboard the width of this measurement and the depth of the pocket. slip the cardboard into the pockets.
Find two tacks. Put the quilt on the wall where you want to hang it.
Slip your hand into one of the pockets behind the cardboard and push the tack through the cardboard and pocket into the wall. Repeat the other side.
The quilt will lay flat and it is easy to get it level with only two little tack holes in the wall!
I love this method.
peace