Everyone is different.

Many times when I felt down, I slept

Another tactic that worked for me was to focus 100% on my companion bag (GHB, PSK or whatever you may call it) and think of how to improve it, and forget anything else ...

Has worked for me.
YMMV
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EDIT:

In emergecy times:
So, far I have't faced a natural emergency like a tornado, earthquake or such. Most emergencies I faced so far are family, social, or personal/financial types. Mostly, if it was really hard, I slept the first day or two. Not spectacular, I know, but it helped me later to be real strong and calm in resolving many issues.