At its most basic, self-awareness is simply self-appreciating the self. To find an answer to a question we are all interested in -- "How am I doing?" -- you have to be willing to look in the first place.
If you want to stay healthy for life, you need to take care of yourself. That's the conventional wisdom. But the real secret to lifelong good health is actually the opposite: Let your body take care of you.
Walk towards that which you wish to avoid, until you can heal the pain that caused you to step back. See what happens if you say yes instead of no to the people and situations you have learned to avoid.
I remember the first time I heard the maxim that "Bad things happen fast, and good things happen over time." It was a recognition that hadn't occurred to me until I was faced with sweeping and traumatic shifts in health and relationships.