Go away from your catchline, then come back toward it when the sun sets
While a GPS can be a lifesaver, map and compass skills will bail you out when batteries, weather, memory and wits fail. At a minimum, you should know how to find a “catchline” that will lead you back to a known location.
Study, then bring along a copy of a map of the area you will hunt. Make note of a stream, road, ridgeline or other long, relatively straight feature in relation to where you park or make camp. That’s your catchline. You will hunt away from that location, and as long as you know which direction you went in relation to the catchline, you’re home free.
Example: I’m camped along a river that runs north-south. I hunt away from camp to the east. When I want to head back, I simply walk west until I reach the river. Camp is either left or right along my catchline. If I’m really smart, I’ve overshot camp on purpose (say, to the north) so I know to walk south when I hit the stream.
See you for happy hour?
Scott Linden Outdoors 
Growing up this was one of the things that took me the longest to learn. Back then there wasn’t GPS and all the apps. And as a kid I was more interested in the looking around and hunting but my dad got me to learn it and I thank him for that.