Communicate. Asking questions is communicating, but so is giving updates. Checking in with others. Co-ordinating schedules. If you are a project leader the importance of communication can't be overstated. If you are any team member other than the leader, communication is just as important. You can't leave it to the leader. Check in with others. Get their input. Find out when the pieces you will need will be completed. Update people on your progress. Communicate!