The late Peter Drucker was known far and wide as the management guru of my younger days. I learned much from his writing and a few speeches. He often dealt with the unnecessary minutia in business and life. Here is a statement that can revolutionize your life and achievement level.
"There is nothing so useless as doing efficiently that which should not be done at all."
Mr. Drucker's statement was aimed the ever present time consuming "meeting." He noted that many meetings are necessary only due to a lack proper initial training plus hiring cheaper but woefully unqualified people for the job. His remark on qualified had nothing to do with a degree but everything to do with discipline and personal motivation.
Knowing what and how to do is vital, but of little value if the gumption to put the knowledge into action is lacking.
Christians above all should be motivated toward self, or spirit discipline, as was Daniel. Daniel had to be self-motivated or become a spiritual slob. He chose the blessing of meeting personally with God each morning, noon and evening. Whether Daniel's meeting involved Kings or Lions he was ready.
In matters of attempted achievement it is okay, actually mandatory to ask; Is this necessary? Why? After a meeting ask; What was accomplished? Is this worth the time invested?
Moses advised in Psalms 90:12 "So teach us to number our days, that we may apply our hearts unto wisdom."