Some people are wondering 'how did that tnt get me' and stuff like that. Kills with TNT depend on the movement that you are doing around a TNT's radius. If you escape too late, then you'll eventually get killed, even if you are 1-2 blocks farther then the normal radius.
Another tip, strafe all arrows. It'll help if you also buy douses and have them in your hotbar to avoid getting killed by an axe. Also, if you think there's a mine somewhere, you can try to defuse it with shears, OR walk to the mine close enough to make it activate, then run back as fast as you can. I've done it before, works most of the time.