Dealing with tasks efficiently

Problem
You worry about unfinished tasks, projects, etc.

Solution
If it's something you can do right away (whatever your definition of "right away" is), do it. If you can't, write down what you need to do and schedule it for a later time. I record the item in a calendar (e.g. "Check if department manager has setup voice mail on my phone."). Later, I get an email reminding me to do what needs to be done at the right time.

My idea isn't a new one; it's the foundation principle described in "Getting Things Done," a book by organizational guru David Allen.