Some things I'd like to add from personal
experience:
Stop working to take a breath if you're getting tired. I know we all get to a point that we're hurrying to finish something, even though we are getting tired / worn out. Throw some frustration in the mix and the result is that you are becoming a lot less aware of your actions, and as fatigue sets in your control over your muscles and limbs become a lot less, let alone your loss of focus when you're getting tired. Almost all of the stupid injuries I've acquired over the years happened because my body was getting tired and I - even just for a second- lost control over it. It's a hecking lot easier to roll and sprain your ankle if you've been walking and lifting all day already.
For people with sloped
land: Don't go cutting / sawing when you don't have level footing. It's so easy to slip when working on a slope. Know of someone in our village who put an axe in his leg because the earth slipped away from under one of his feet when
chopping wood on the mountain. He was alone on the hill without phone reception. He had to drag himself to his car while bleeding profusely. Drove home so his wife could bring him to a hospital! His leg survived, but he was immobile for most of 2 months. Slopes and sharp materials don't mix well!
Lastly, don't lift and twist at the same time. Discovered that the hard way. Injured my inguinal ligament by doing something as silly as lifting myself out of a low car with some stuff in my arms, twisting my torso and hips while my foot was still flat on the ground. I wasn't even lifting something heavy but that wrong movement had me virtually immobile for a few days. Even worse still, it seems to have permanently damaged the ligament, because ever since (and it's been 7 years!) each time I overstress that leg, the ligament starts inflaming and I'm crippled for a few days again.
I'm still angry about it. Hiking in the mountains is my great passion, but I can never hike longer then a few hours before it starts hurting and I know I have to back off.