It all starts with organizing yourself. Having done that, you will be in a better position to accomplish your goals and assess your own capacity to deliver the desired result. You will feel much more secure and in control of the tasks. Organizing must not be confused with neatness or carefulness but with a desire to be well versed in your own area of expertise and knowing the basics of the task which needs to be accomplished. Moreover, organizing will then allow much more clarity on how to plan your work.
Develop an outline of the project under discussion. Gather as much information as you can in order to understand all relevant factors. Developing a schedule will help you understand the time-frame of the project, which can then be communicated to the other members of the team. Pinpoint the obstacles that you need to overcome.
An important part of planning is mental preparation. You will need to work with other co-workers and as a leader; you must be able to justify the notion of team work. Delegating the task is a foremost duty of a leader where he or she is able to trust the abilities of others to deliver. Remember, you cannot perform everything on your own, and similarly, cannot take entire credit for the project. Preparing yourself mentally for that may be the most crucial aspect of taking more control.
Hold periodic meetings, where you allow others to speak and help you out in overcoming certain problems. This way, you can relieve plenty of pressure off your shoulders and will be in a better position to manage deadlines. Make sure that you display full faith in their opinions rather than telling people what to do.