You can read 5 books on increasing your productivity and achieve exactly the opposite: namely, nothing. Reading a book means you're not starting a project. Productivity equals zero.
Sometimes life strikes unexpectedly. However, instead of letting adversity take control, we can decide how to react to it. Recently, I was bitten by a dog, resulting in my left arm being casted. Instead of lamenting over the circumstances, I chose to make the best out of the situation.