1. You could do simple Stitch in the Ditch.
2. You could do a straight line stitch 1/4" away from the ditch. As long as you do this in all directions, the seams will be well supported.
3. You could use the serpentine stitch (like QuiltNan suggested). I have done that on one of mine before.
4. You could use a different fancy stitch.
5. You could do a basic meander all over the quilt.