Be bold, take risks
Take decisive action that moves the game and situation forward. You're the PCs, the folks that Stonetop looks to save them when danger looms. If you don't act like a hero, who will?
Avoid being overly cautious, or spending hours on careful, elaborate plans that cover every contingency. Plan a little, sure. Be clever. Play to your strengths and your weaknesses, and consider what your character, specifically, might do. But don't let the game grind to a halt. If you find yourself deliberating for more than a few minutes, stop. Make a choice. Act. Play to find out what happens.