This answer was first posted on Goodreads. I updated it a bit.

Reading

You should read four books per week. Every week. I mean it when I say it. Four books per week. If you don’t have the sit down time, get into audiobooks, and listen while you drive, cook, clean, eat, shop, and shower.

Seriously. You should be reading four books per week, and they should break down as follows:

One classic novel outside your genre, One popular novel in your genre, One book on writing/publishing, and One book...