All with medium pressure-
1. Shave once forehead hairline to neck hairline.
2. Shave once neck hairline to forehead hairline.
3. Check with your hands, and spot reduce those leftover nubs until they're gone by shaving against the grain
I would only shave every other day - every day and I cut myself way too much.
A few tips for the spiral in the center of the back of your head - you may want to get that off with sideways shaving. Parts of your head have hair that grow "sideways," but it's easy to forget about that so I bring it up here as that used to be a place that bugged me. That and the sides of my head right above the "rat-tail" region - I also shaved above the "rat-tail" region sideways, and worked out great.