I use an Elmer's Purple School glue stick to baste my binding on. As I approach a corner, I check for that seam and if it looks like it's not going to make it past the corner an inch or so, I open the folded binding and cut it diagonally a few inches before the border and then again right after the seam that's going to be problematic. I sew them together and continue on around the quilt. Very fast fix.
