Almost all of my firewood is cut on hillsides. So every piece needs to go either uphill or downhill from where I cut it to where I can get my pickup truck ... close.
Most of the time I use the "pitch" method. I cut and block it up. Then I grab each chunk and "pitch" it as far towards the truck that I can. When everything is tossed that far, I then go to that "pile" and throw it again towards my truck (or where I can get to it with the truck). Two or three "tosses" usually gets it close enough to throw it in the truck.
And sometimes I just ... carry ... it a couple pieces at a time. The big chunks I carry two at a time using those old fashioned Ice Tongs to grip each piece. That gives me a good grip on them without having to hold them in my arms/hands. Just grip that center handle on the ice tongs, slip it down over the firewood block, let the points dig in, straighten up and carry to the truck. There are several companies making/selling modern versions of wood carrier tongs, but those old single-handed ice tongs work great.
Occasionally I drag the smaller trees out to where I can get at them with the truck. With a section of rope, I can drag the smaller stuff myself. But sometimes I use a long steel cable to pull them with the truck or tractor. I could use a mechanical winch like the loggers use, but so far the initial cost hasn't been justified for the few times/places I might use it.
One neighbor uses his little 4-wheeler ATV to haul things out with a little trailer behind it, or to drag things out.
The final "tip" would be to use a wheelbarrow. People just don't think about using a wheelbarrow out in the woods. But you can move a lot of stuff with one if the ground isn't too steep.
In the end, it's just a lot of work, no matter what method you use. But working at it slow and stead will get it done in time.
Mikey - that grumpy ol' German blacksmith out in the Hinterlands