1. Stay focused
Powerlifting includes three events: squat, bench, and deadlift. The goal is to lift a lot of weight, not to have variety. Unlike body builders, who have multiple forms of exercise for each muscle, powerlifters generally train these three exercises, using others as necessary but not at the expense of these. In this way, they work the entire body and show results without wasted effort.
As a writer, what are your goals? Write 1-3 of them. To be well-rounded, have one about progress on your current book, one about networking, and one about steps to publication or post-publication marketing. Focus on other areas as needed, but never at the expense of these goals.
But what about your daily flash fiction, your blog, revisions, and sending to agents; Facebook, Twitter, and Instamatic; surfing for answers online, reading similar books, and going to conferences? Each of these can be helpful, but only do them if they help with your three goals. Aim for variety in your writing, not your writing habits.
Stop reading — write those goals now.