Everything Toogie said! There are so many variables too, such as the unit or block being made. I have only ever completed one quilt that had perfect points.
Starch
Pinning
Accurate cutting
Taking your time and willingness to rip and resew a seam or make a new unit.
Being in the right frame of mind.
Try paper piecing the unit or block
I always try my best when making a quilt, but missing points are sometimes unavoidable no matter how much you starch, pin, slow down etc. . If its totally obvious, I redo the offending section, if its just a smidge, I am moving on.