To face your fears have a friend or family member help you
A lot of caffeine if you don't wanna ruin your lungs, vaping and smoking are stress relievers and I heard that it helps with homework but since I'm a xc runner that wouldn't be very good on my lungs and I don't recommend it.
True, doing exercise every day or every other day would help relieve stress and make you sleep better.
Based on data it can change per time you do the experiment, thats why repetition is key to check for errors