I learned this from the book Spartan Up by Joe de Sena, founder of the Spartan Races. Before Joe had been on Wall Street, where he had to make IMPORTANT BUT QUICK DECISIONS!

You weigh the UPSIDE (POSITIVE) against the DOWNSIDE (NEGATIVE) of a problem or challenge BUT don’t spend time OVERTHINKING or OVER ANALYZING it!

This process can be used in your training too.