[rhn_mk1]

Try using a paper map, no GPS. It forces you to pay attention to the surroundings, and to turn that into spatial awareness.

If your problem is only that your spatial awareness was never exercised enough, you should quickly get better.

You'll quickly get tired of checking your map for the route every 10 steps, which will force you to choose easier routes, and to memorize them better, improving your navigation too.