What do you expect to happen?
I have generally low energy throughout most days (last Friday morning was a welcome exception that I haven't figured out) and am trying to fix this. I've been told that cutting out processed / refined carbs is an intervention that has fixed this problem in some people. And a hypothesis affords testing. My current estimate of the probability that this intervention will fix the problem (subjectively; I may also try dual N-back testing to quantify the effect but am open to other suggestions) is maybe 40%.
As I understand it, Lent is a holiday where we celebrate the scientific method by changing exactly one variable in our lives for 40 days. This seems like a convenient Schelling point for rationalists to adopt, so:
What variable are you going to change for the next 40 days?
(I am really annoyed I didn't think of this yesterday.)