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:

• adj.: Producing or capable of producing crops, goods, or services, especially in abundance.
• adj.: Marked by abundant production or achievement: synonym: fertile.
• adj.: Yielding favorable or useful results; constructive.