Make NO decisions while in a bad mood.
What constitutes a bad mood?
Frustrated, irritated, upset, "right," mad, vengeful, disappointed, discouraged, sad, wronged, guilty, embarrassed, bored, overwhelmed, anxious, uneasy, afraid, unsure, indecisive, self-critical, judgmental, defensive, regretful, angry...
There are more, but that covers most.
All of these emotions provide a skewed point of view, so no decision can be relevant.
A 'skewed point of view,' means;
wildly inaccurate, one-sided, gathering of proof of a belief (which can always be done, no matter what the belief).