It is very broad and subjective. However, we should strive to perform such activities that give us a sense of satisfaction, that makes us happy even in most of the tiring times. Living a meaningful and purposeful life. Don't harm others with our acts or words. If possible, do some charity because it is virtuous. Strive to live a healthy life. Never gets stuck in life, our every action should be directed towards our mental, intellectual and spiritual upliftment.

The fear of God is the beginning to wisdom. We have though some papers with the meaning of life:

To make a meaningful change in your society or community is a good aim. Always keep in mind the "do no harm" principle.

Just do honestly what you have to do.