Here's a simple list of things you can stop doing today and become a lot more productive than you thought you could be. Take some time to ingest the entire article. Here's my favorite:

Putting off your most important work until later in the day: People often start off their day by completing easy tasks to get themselves rolling and leave their more difficult work for later. This is a bad idea, and one that frequently leads to the important work not getting done at all.

Original source found here.