It's why having a plan and a strong conviction of that plan (for me this means having to schedule time to purposefully "sit down" with myself quarterly to ensure the plan is still accurate) is so important. When the shit hits the fan you want to be able to realize you are dealing with emotion, and to go look at your pre-flight checklist so to speak before you sell anything. If pre-set conditions aren't met, you have no decisions to make.

If you go into a "situation" thinking you are already overleveraged or whatever, you are much more likely to do something silly vs. if you went into the same situation comfortable in the logic of how you have your finances configured.