In reply to Shaunhaynes99:
Unless I'm running a really long way, I just remember where I'm going. It's not that hard with practice and even if you're only vaguely familiar with an area it's surprisingly easy to head in the right direction without going too wrong, even if you have no idea where you are at any one moment in time.
I personally think a paper map (or printed section) properly used, is best if you need something. So much information, so little weight and you can tuck it in a waist band so no need for bags, belts, straps.
Relying on an electronic gadget to tell you left or right sounds like a recipe for disaster. Like all the worst bits of GPS (battery, fragile screen, heavy, unreliable in woods) but with none of the good bits. My experience of running on the line traces on Garmins is that it's really hard, you have to zoom in and out to get the scale right and if you're not moving fast enough it's not quite sure what direction you were heading, so you have to kind of 'try each way' for a bit and see if you're still on the line.