When I come down the right side on my face towards my goatee, I can't actually see the goatee (holding my razor in my right hand) so I shave by feel. That is, when I feel the goatee I stop. Then I use the heel of the razor to shave around the goatee; at that point I can see the heel and the goatee. It's the same with the left side, stop when I feel the goatee, use the heel of the razor to shave around the sides of the goatee.