stress = unclear path towards reaching your objective

Uncertainty in reaching your objective creates stress.

Unclear path, ie. what steps need to be taken and how succesful they will be creates stress.

Expectation vs Reality: i expected A, but B happened. All comes down to predictability. When B happens, we have to redraw the terrain. This redrawing causing more energy expansion, which can cause more stress. I have been working on this my whole day, and now I did not save my work and all my work is lost. I have to start again.

Any tool that can give us this predictibility gives us a sense we are in control, hence less stress. Of course in many cases this sense of control is just an illusion.

Wanting to do two things at the same time creates stress, because underlying predictability how to reach the objective is not clear yet. Decision has yet not been made about which task to choose first so you get stuck in a loop of decision. Stress is expressed.

If you are aware that this is the feature of your system, does stress play still the same role?

Guilt creates stress too. I should be doing X, but I am still doing Y. Since you know that X requires lot of energy but you have not yet started, you dont know if you will even finish it within a time you set for it. (Expectation vs Reality). Again, you are creating this unpredictable environment for you and your task. Is it gonna be completed in time? Stress is expressed again.

It all comes down to how you interpret consequences. Change your relationship with consequences and you can change your wiring towards upreditable items and eventually stress.