He spends a whole chapter talking about the tyranny of the "urgent" and how we often allow it to crowd out the "important"... and how essential it is to plan/balance the necessity of one vs. the desires of the other.
I think I realized this intuitively when I was about 20 or so, but when you have your principles defined and commit to them daily, everything else flows from there... When you have a driving purpose in life, everything from confidence to leadership to relational skills to technical skills and even your desire for being physically in-shape all develop and naturally flow out from your overarching desire to meet that purpose. Covey calls it "true north", and it's a great metaphor -- when you know "true north", all paths that don't bring you in that direction immediately and quickly become irrelevant to your life.
Even better, you rarely need self-help books along the way, simply because life will teach you all the unique lessons and tricks you need to learn as you strive intentionally towards that mission.
With that said, once you've decided that you're doing things that matter, hack away, because time is still the currency of life.