Here are the steps to bind a quilt with mitered corners:
1. Cut the binding strips to the desired length and width, and mark the center of each strip and the center of each quilt edge.
2. Align the raw edge of the binding strip to the raw edge of the quilt, starting from the center mark and leaving some extra fabric at the beginning. Use pins or clips to secure them.
3. Sew the binding to the back of the quilt, using a ¼ inch seam allowance and stopping ¼ inch away from the corner of the quilt.
4. Fold the binding strip up at a 45-degree angle, then fold it down along the next edge of the quilt, creating a mitered corner. Repeat for each corner.
5. Join the ends of the binding strip by overlapping them and sewing them together.
6. Fold the binding over to the front of the quilt and whip or slip stitch it in place, making sure to fold the material at the corner under at a 45-degree angle to create a mitered corner.
I hope that helps! Let me know if you have any other questions or if there's anything else I can help you with.
[Here](https://www.ehow.com/how_5091791_selfbind-backing-fabric-mitered-corners.html) is a tutorial I found that goes into more detail on how to bind a quilt with mitered corners.