Write the decision as one sentence before you start the clock
Before you open Claude, write the actual call you owe someone as a single time-bound line, like "Decide whether to open an Austin office in Q4." If you cannot get it into one sentence, you have a debate, not a decision, so sharpen it first. Doing this and the next step before the timer starts keeps the full 18 minutes for drafting and editing instead of hunting for facts.