If I know the terrain well enough, to hell with rule 5, fly down the valleys.
Most of the time however, if I reasonably can, divert to any runway long enough or a big field.
If I can't, climb into IMC, gentle turn around and get out that way. This is very much last option in a VMC-only aircraft however.
Have done (1) and (2), not yet (3) thankfully.
G