What have you learnt isn't worth worrying about/doing in the game?

Since beginning your DayZ journey, what have you now realized isn't worth your concern or effort?

For example....

Avoiding Rain - When I first started playing, I used to hide in buildings and wait for it to stop raining like an absolute fool. After a while, I realized that you just carry on and dry your clothes when you can, but basically not to worry about it.

Hoarding food - I used to store so much food in my inventory and save it for later, like rationing. Once I saw a 'Dayz for n00bs' video that said to just eat whatever you find immediately, storage space became much less of an issue.

If you could back in time (knowing what you know now) what would you tell yourself not to stress over?