Very often I'll delete faces, simplify things a bit (dissolving unnecessary vertices) and make faces again by selecting vertices and using the "Make Edge/Face" tool F. Sometimes the generated faces are in the wrong direction, i.e. normals pointing inward, so I need to check and flip them manually.
My question is, how is the normal direction determined when making a face? It doesn't seem to depend on the direction/order of selecting vertices and the result is quite random.
Are there any tips to make face normals point at the desired direction so that I don't need to flip them manually later?