I've been thinking about this interesting question. I guess for me "Aging Well" consists of three areas.
1. Knowing & accepting that I'm aging. That is, not criticizing myself for things I can't control--deteriorating eyesight, slower physical reaction time, etc.
2. Appreciating some very special gifts of this time of life--being a grandma, time to myself as I'm retired, some accumulated understanding of myself and the world around me.
3. Keeping aging in perspective--I'm still myself. I've been an adventurous toddler, a reckless teenager, a tired young mom, a professional, and now an old lady in boho earrings. Each time period has been important, and a mix of good and challenging. I've outlived my maternal grandparents--who I loved a lot but who were very frail by their 60s. They were immigrants who'd had malnutrition and devastating diseases as children. I'm grateful for an easier life!