The realisation that you are getting older can come in waves, writes Christopher Mele in 'The New York Times'.
People start feeling old in their 60s. A survey found that 68 was the average age at which old age begins.
Once you pass the median age of 37.8, you may statistically be considered “old", said Tom Ludwig, emeritus professor of psychology at Hope College in Holland, Mich.
Having friends from multiple generations can help head off the loneliness that can come when others move, die, get sick or are no longer mobile.
Many of the problems that adults face as they get older are unrelated to the normal part of ageing. The quality of your later life is partly under your control. Choices about lifestyles and behaviours can influence the effects of so-called secondary ageing.
People should prepare for the later stages of their life as they would starting a family or helping a child gain independence. Discuss with your family and friends what type of lifestyle you desire.
The reality of ageing was not as bad as stereotypes would suggest.
While you might not be able to do all the things you once did when you were younger, there are ways you can compensate with other activities that are rewarding.
Remember that you are not the only one feeling sore or slowing down. There are millions waking up with those aches and pains.
Though various milestones such as birthdays, changes in careers and the deaths of siblings and peers are reminders of the passage of time, you should continue to focus on finding meaning and quality in life. Reject ageist attitudes.
Being able to adapt to the changing context of our lives is the key to success throughout life.