I have an experiment for you to try. Find a large, empty field. Make sure it has no large hidden obstacles, like sinkholes or ditches. Start at one end, and walk about ten or twenty feet into the field, in a straight line, and pick out an object on the far side that matches up with the other end of the line. Stop, and look behind you, and note where you came out. Know this spot, and imagine a line between where you started, and where you were going to. Now, keep walking to where you were going to, and after a few steps, close you eyes, and walk for another 50 or 100 paces. Stop and open your eyes, and see how close you are. Did you walk in a straight line? Did it curve one way or the other?
In general, people curve when they walk. Frequently, people who curve one direction will always curve that direction, barring other factors. If you know where you want to go, there are several ways of making sure you follow a straight line. Always having three landmarks, one behind and two in front of you, is a good way of doing this. Being observant is another. A compass alone is not a good method, unless you make good use of landmarks as well. This may sound elementary to some folks here, but trust me, it is not so commonly known. I've seen an entire patrol of 8+ boys move 15 degrees in heading after traversing only a hundred yards or so. Give them a mile or two, and they may very well have made a complete circle. Thank goodness the farthest leg we had them travel was only a coupla hundred yards...
The only place I've ever wandered in a circle was in a car, in the old down-town part of a city or two I've been in. I'll frequently acquaint myself with the large area, and then take off in my car to see the small details. Sometimes this means I wander around a bit, and then come back to a place I've been before. I don't call this 'lost', I have a map, I know where I need to head to to get out, but I'm wandering around seeing where everything is. And occasionally, I'll be pleasantly suprised and come back into a place I remember.
It's relatively easy, though, to remember which direction you are heading in a car, especially in a city. Most streets are pretty straight, and hit each other at more or less 90 degrees. It's a lot tougher on foot, and though I've never seen someone walk in a complete circle, and know few people who would admit if they did, I have seen people start off on a big arc, and have to be corrected, or notice only when the come to the end of the distance they were pacing out..
Stryver