Dont sharpen your axe / tomahawk while laying in bed watching TV. Dont fall asleep with your axe / tomahawk in bed.
Good advice, and a rule I have broken more than once.
Also, slightly off topic, never fall asleep while actually holding an unsheathed sword in your hands above you!
I did that once too, and luckily it was the flat of the blade that smacked me right in the face, not the edge (it was pretty blunt, but would have split me wide open anyway).
I woke up suddenly thinking some one had punched me in the face!
My dad was a logger for a while. I grew up cutting our own fire wood. We have cut down trees bigger than 4 foot across the base. When we do trees like that, you really, really need to pay attention. Number one rule I learned.........figure out how tall the tree is first, then park at least twice that distance away when felling. We had a guy park is rig too close. He did not think the tree was going to go that way, and he thought he was far enough away. He was wrong on both accounts. Totaled his vehicle, it was smashed so bad, it could not even be driven back down the 15 miles of logging road! It was an expensive tow!
Another rule was good gloves for using the chain saw.
My dad always used those fluffy slippery cotton gloves (his were always yellowish orange) I don't know what you call them. I have seen him get kissed by the chain saw and the gloves just slid the chain. Scary, to say the least, but no cut on his hand.
I have seen the same situation with a regular leather glove. Went through like butter. That friend (also a life long logger, though has not done it for a living in a very long time) really badly cut his hand with just a bump. He had leather only gloves.