Welcome Reddite!
very norse sounding name, I like it...

The name of the game for WBTB is relaxation + awareness...Its tricky because if you are too aware, it will be hard to fall asleep and if you are too relaxed, you may fall asleep too quickly. However, what you describe seems like a bit of stress, perhaps some anxiety about being able to do what you are planning. Stress in any form can reduce recall and make sleep less restful. So the best thing in my mind is to be as relaxed as possible.
I was reading the other day about WILD and they suggested counting numbers in your head after you have chosen your sleeping position. Visualize the numbers as you count and that will keep your mind occupied while your body falls asleep. This will also distract from itches, dry mouth, or fidgety muscles.

Hope that helps!