Life can be divided into stages by age, or by achievement, or by wealth or power, it varies from person to person.
Personally, I think the best state of life is to be able to do what you are interested in and enjoy when you are in your early 20s.
By your early 30s, it should be possible to have a good financial return on those things in addition to doing what you like. Because this stage of life than the early 20s will have a lot more requirements and consumer needs, social circle is no longer purely for interest and together most people, such as a ball game, play a car and so on the simple party will be less and less.
To 40 should be in the previous two stages of life are accumulated on the basis of, become in this field has the dominant force or appeal of the people, can also be understood as the right to speak and influence. Differ from 30 years old, this stage in addition to doing what you like or cause of the economic returns have a higher demand, social prestige, industry status, social circle gold, the size of the discourse and so on began to make different people of the same age towards the watershed of life.
To 50, should begin to learn to deploy career (note: not simply refers to work) and quality of life investment ratio, if 40 stage go well, 50 should be the life of the more desirable return period, but also have a good physical and energy to enjoy the results, such as traveling around the world, expanding the overseas field, etc. 50 after the career breakthroughs to the possibility of a huge change is not particularly huge, unless you live in a The first thing you need to do is to get your hands on a new piece of equipment, and you'll be able to do it in a way that will make you feel good about yourself.
60 is the time to focus on physical and mental health, and everything else becomes less important. In addition to political and big chairman figures, most other people's 60 should be the beginning of people who pay attention to health and healthy life. Well-conditioned, most of them have a chance to live to 80 or 100 years old.