Food for thought from "Time and the Art of Living" by Robert Grudin,
Chapter 11:

XI.14  The schoolboy learns quickly to divide his day into periods which he does or does not enjoy.  He lives a mixed day, but an ordered one; and even with his youthfully expansive sense of time he need not look to far ahead without perceiving some future pleasure.  But adults are often deprived of this solace.  [We] might do better by trying to regularize a few pleasant experiences during the day.  Individual activities aside, the mere act of planning one’s day with this goal in mind will be an important personal victory.

XI.15  The happy individual is able to renew daily and with full consciousness all the basic expressions of human identity:  work, love, communication, play and rest.

XI.18  Those who labor for bread or money alone are condemned to their reward.

XI.22  We struggle with, agonize over and bluster heroically about the great questions of life when the answers to most of these lie hidden in our attitude toward the thousand minor details of each day.

XI.23  Regretting wasted time is itself a waste of time, an unconscious strategy of evasion.