Focus on the activities that will most help you accomplish your goals. Break the project into smaller pieces and take them on one at a time. Set deadlines to keep moving at a steady pace. Set milestones and metrics, and reward yourself when you reach them. Identify the key processes for your project and focus attention on them.
Problems here can spill over into other areas.
If you start falling behind, check your to do list and delegate less important work to those who are capable of handling it. If there is no one else, consider subcontracting out or hiring help. Make sure you have all the information you need to do the task. Hold-ups in work are often due to missing info.