The good times do not last. And that’s precisely why they are so good.
Pleasure has no meaning if it’s the only thing you know. Those times in between the good times are what make the good times enjoyable.
When the party is over, go to bed. When the vacation comes to an end, unpack, do the wash, go back to the office.
Good times will come again, soon enough. In the meantime, live your life, do your work, earn the pleasure that is to come.
Even the most enjoyable experience you could imagine would become drudgery if it never ended. Keep life enjoyable by allowing the joys time to renew and refresh.
Good times end, yet more will come. Bide your time, earn the pleasure, and make the enjoyment even better next time.