Decide what is important and make it your priorities.  Plan what you need to do to reach your priorities.  If this sounds simple, it is.  I find that those who are successful think of everything thing they do in terms of how it can help reach their priorities.

Stephen Covey said, “You have to decide what your highest priorities are and have the courage—pleasantly, smilingly, unapologetically, to say ‘no’ to other things. And the way you do that is by having a bigger ‘yes’ burning inside. The enemy of the ‘best’ is often the “good.” 

This process fills your time with only productive activities.   If your plan is not advancing your priorities, change the plan.