1. Write It Down

Every task, every commitment should be written down. This frees your mind from the energy- and attention-sucking job of trying to remember.

In his seminal book on productivity, Getting Things Done , David Allen points out how uncompleted commitments take up psychic energy, each one making you just the tiniest bit more tired, more distracted, and therefore less productive.

He emphasizes that the first step to managing your life and time is getting every commitment, large and small, out of your head and into a trusted system.

I use OmniFocus to capture these commitments, but you can start with a simple pen and paper.