Play with yourself?
I mean keep yourself entertained of course. Like just do whatever you can to keep your mind off of all thing negative.
When i say play with youself i mean if you are just about to start and all you can think about it stressful thing, just twiddle your thumbs, talk to youself, hum, whistle, anything to keep your mind of it.
2x M-Fil 300, head heavy, about to be retired
K95 16x18 on their way soon