Look after your body.

Throughout your life you will own many different things. You will have many friends who will come and go. You will live in different places. There is one thing however which you are destined to keep for a lifetime. You have just one body and although medical science can replace bits it cannot fix everything. My advice is simple; you have just one body so look after it. This means taking regular exercise, eating healthily, and watching your intake of toxins. It also involves managing your stress and dealing appropriately with your emotions. Often our bodies suffer the brunt of our mental issues.
If you're not sure where to start, the Internet is a wonderful resource. There are plenty of great sites and also access to specialist books on the subject.