Often when I feel stressed out by stuff I need to do, I just list it all out on paper on in a .txt.
I'm not an organized person in general, so I have strong aversion to doing so. But I find that once I do I finally feel clarity and can immediately see what is the most important thing I should be doing right now, and I feel at ease that the other tasks are not forgotten.
I like to have some kind of backlog of tasks to do, and clean that up regularly and start fresh with a daily list of tasks to do.