To join the group of those who can work well with these machines, therefore, requires that you hone your ability to master hard things. And because these technologies change rapidly, this process of mastering hard things never ends: You must be able to do it quickly, again and again.
– Cal Newport, Deep Work
Definition of the word Productive:
In the context of the life I would like to live (e.g. the future), what _is_ productivity? How would it be defined from my personal view point? Productivity can have many meanings on it's own depending on what facet one is being 'productive' at.
Money is one facet to look at for time input. It definitely shouldn't be the sole focus of your life. Perhaps there is some ideal amount of money to be made per year at the point of maximum time input? An amount of money which could sustainably hold a quality of life for the forseeable future. Say ~$100k annually with a maximum working hours of being 2080? You know, that's not including vacation, so a maximum of ~1800 hours ((25vacation + 11holiday) * 8hours = 288 hours).