I take what I can get, as much as I can get, when friends or neighbors take down trees. I'm friends with a climber; sometimes I put him onto jobs where I know somebody who wants a tree down and wants to save some money. He does the dangerous part and takes his check, I do the cleanup and take the wood. Getting a big locust in a couple of weeks this way. This spring another tree service was taking down a big dead white oak three blocks from my house. They had a sign up, "free firewood." Several people came with trucks and trailers, but I was there nonstop, did seven axle-sagging loads in four hours, busted my rear, took all the crotches and gnarly and weird pieces other guys left. When they were done, they were grateful for me keeping their site clean and dropped off the whole trunk in my driveway. Seven pieces, about 36" dia and 30" long. I was lying in bed waiting for the ibuprofen to kick in when I heard the truck, went from feeling like I was never going to move again to feeling pretty darned good in about one second.
I often get antsy when the stacks are going down and I don't have anything to split, but it seems like something always turns up. Two years ago I had so much cherry from a microburst that took down a bunch of trees that I ran out of room and gave about two cords away. Being opportunistic, willing to work, and not looking like an escaped convict is my formula. When that stops working I guess I'll have to think of something else.