Measure and cut your border fabric, batting and backing fabric. Cut the pieces slightly wider than the finished size of your border. Layer your border fabric on the quilt top, right sides together, and on the back, place the backing right sides together with the back of the quilt and then the batting. Do this with both sides (or the top and bottom, if that's how you roll). Sew through all the layers and trim the batting from the seam allowance, then flip and press. There'll be a little extra bulk at the seam, but it should lay fairly flat. Then do the other two sides. You can then quilt your border, if desired. Trim the border to the desired size (remember you cut it a little big). Then apply the binding.