While this is humourous, I'm not sure it's the greatest advice. It kind of depends on which way the map is facing. Some face south, some west, some north, etc. I think you need to figure out which way you're facing so, when you look at the map, you can figure out whether you're currently facing toward the top, bottom, left, or right of the map.
it's not, but it will help. the point is that after reading the map, turn your back against the map before you start walking.
If you don't turn your back, you will ends up going the opposite direction of where you wanted to go.