This is a great software development article from Joel Spolsky, creator of Trello, on not becoming distracted on things that don't really matter. Things like wasting time on carefully maintaining a backlog of tasks that, if you were honest with yourself, will likely never be completed.
My favorite quote from the article: "My original idea was to make a product called Five Things. It was going to be a project manager where everybody was allowed to have five things assigned to them: two things they were actively doing, one thing that was “up next”, and a couple more that they were planning." I like that idea: a task management tool that enforces by design realistic expectations.