One thing that helps me is to keep the full length of the blade in play. For instance when I shave the center of the neck I start at the highest point using the heel for a stroke or 2. At the next point I start with a point on the blade a bit closer to the center for a couple more down strokes. And so it goes. So as the shave line gets lower I continue to shift the contact point of the blade towards the toe. You can keep working like this as needed.