THIS LIST (MOST OF IT) is from a tumblr post however I was unable to find the original blog that posted it!

1. Sticking a landing can hurt/break your ankles + messes up your joints depending on how high they jumped/fell from! This is why most free-runners dive + roll.

2. Hand-to-hand fights don't last long! Minutes at the most, actually. It's exhausting and without tons of training, it will tire your character out easily.

3. Arrows are effective in the sense that you cannot just rip it out without consequences and they will pretty much always require medical attention.

4. Don't throw the enemy far away! It gives them a chance to escape! Unless your character needs to shoot them or something, it's completely useless.

5. Adrenaline works against you, actually! It tires you out and makes your moves shaky and inaccurate!

There's more, but these are the main points! Hope this helped all you action writers out there!