If your questions about a project aren't clear you won’t know how to prioritize steps towards the goal. Aside from acting as a To Do list there are several other benefits of listing your questions.
• It removes monkey-chatter. Until questions have been addressed they take up mental and emotional space in your brain. Documenting them helps eliminate that distraction.
• Once you have listed you questions they become more manageable, easier to address and prioritize.
We tend to spend our time on smaller, easy to solve problems because they’re require less energy and we can pile them up, which is good for the ego. At the end of the day we review what we got done and the bigger the pile the better we feel. But do all those smaller tasks require action? Be wary of filling your day with small tasks that don’t advance the larger concept.