Time management is important. Patrick Collison, one of the co-founders of Stripe, addresses this with a wallpaper [0]:

“Patrick’s desk is covered in books […] The wallpaper on his computer displays a countdown clock for his life: He has 52 years and a few days left. “This is a very coarse estimate, but it’s a reminder that you get old quickly,” he says, a touch of gray now in his red hair. “When you talk to people who are old, some wish they had enjoyed themselves more, but not many wish they had wasted more time.””

[0]: https://www.bloomberg.com/news/features/2017-08-01/how-two-b...