Before you begin, set forth a plan. This is the most important part.
Having an adequate plan is especially important if you need to communicate and coordinate with one or more people. And hey, of you have more than one thing to do, why not put those in some central place that all parties can see so you don't drop the ball on on one or more of them? Try tracking things like progress, blocking, and work in this way too.
Devise a system of communication and a workflow that works for you and your organization so that it's not all in your head. This is the start to doing great things. Manage your work effectively, and you will work more efficiently.