Slow and steady wins the race IMHO. Some machines have 1/4" feet (Janmome does) that have a fence along the inside to line your fabric up against. Some have quilting bars that are adjustable so you can set it to the width of stitch you need. I also have a "Little Foot" quilting foot and as long as I eyeball the edge just right (it's see through) so that I can see the fabric edge under the foot or on the outside edge of the foot, I can get a perfect seam. I sew slowly to ensure even stitching...I just hate re-doing. Good Luck!