A world famous popstar Madonna celebrated her major milestone, 50 years. For many people this age seems to be to high to set some aims and reach them, others consider this age to be the turning point in the life. Madonna's carreer hasn't changed. She begins a world tour and is regarded as the beauty and fshion icon by many people in the world. Some people say that this age is somehow the beginning of the next period that influences their behavior. They try the things they haven't before because they think that not much time left for them.
So, every person chooses his own way of life. I think it's better to enjoy life and don't think about age. It's only written in your passport, you may be the same young person as before in your soul.