As you may have noticed, I am not a fan of starting to carry out your plans tomorrow, at the beginning of next week, next month, or next year. It is always better to start right now, going from the simple (tasks for the day) to the most complex and interesting (goals for the year). Therefore I see no age barriers that would prevent planning, except barriers set by your own mind in the form of personal beliefs: that I am too old, or too stupid, or too lazy for this.
If a person aged 50–60 believes they are old and have already lived almost their whole life, then with such beliefs it will be impossible to convince them otherwise. At the same time, in the chapter on time (in the first book) I wrote how long people used to live on average, how long they live and can live now with proper care for their health, and how long they will be able to live in the future. Therefore it is quite funny to hear 50–60-year-olds write themselves off prematurely.
If we take the other extreme — young people and children — they are unlikely to even think of the idea that you can do more than live day to day, doing a little each day toward your overall goals and achievements. Such thoughts may come closer to age 20–25 — at best. And for most people they never come at all in their entire lives. Moreover, I believe you should not deprive children of their age and childhood interests and hover over them harshly with planning from an early age. On the other hand, I see nothing wrong with getting children used to burn-down charts, goal setting, and task prioritization from an early age. And as praise for completing various tasks you can give games, sweets, and other things children want.
