1) Work during the times when you feel most productive when possible, 2) take frequent breaks to rest your body and mind even if you don't want to AND take a few moments to reflect on your progress , 3) do something everyday that inspires you (this helps creativity), 4) eat well and stay hydrated, 5) let go of things in your life that you can do later or don't matter, 6) limit social media and electronics until you are at a good stopping place, 7) consider gently ask your teammate for feedback on your work (it's probably better than you think), 7) reward yourself with something you enjoy each time you finish a project, 8) and last but most important - do your best and let go of the rest. Remember - showing up is 75% of success in life.

Just some ideas - take what you like and leave the test. As I said, I know from my own experience that you are better than you think you are.