Learn the contours of your area, the landmarks, even the colours. I live in SE London, so if I'm lost in the countryside, I head towards the bright orange bit (night) or dark green ridge (day). There are telecom masts nearby that I also use, and handy things like the M25 (cross under it an even number of times).
There's also the road numbering. A23 is too far West, A3x even more so, A2 too far east, A1x even more so. After a while, it all comes easy. You learn the valleys, you learn the ridges, you find your way.