You can start by creating a task or time management journal that you keep religiously for one week. During this time, write down all the things you do and make a note of how long they take to complete. Include everything – even interruptions, coffee breaks, calls, emails etc.
Make sure you also write them down in order. By the end of the week you’ll have a pretty good idea of where your week is going and what tasks are dominating – you may even find the little things are occupying most of your productivity.
From there you need to identify priority tasks and determine how they rank in terms of time spent on them. Is the balance correct? When you have limited time and seemingly infinite tasks to manage, allocating levels of priority and adjusting it as tasks are completed is a good way to get things done.