When I was 19, I came across an article titled "the top 5 regrets of the dying" written, if I recall correctly, by a nurse in palliative care. What really stuck with me out of that is taking the time and energy for who and what I really value. Around the same time, I was doing a lot of reading into what makes people happy. What I came to is: relationships with friends and family, leisure time, health, and meaningful work (religion was another contributor, but I'm areligious, so that ship has sailed. However, some scientists think the boost may be due to community ties, belief that life will turn out ok, and taking time to pray/meditate). I've always tried to live so that when I'm old, I will have a lot of great ideas and stories to share, be surrounded by those I love, and so that when I'm on my deathbed, I won't have a lot of regrets.
So, I guess my life long goal is to live a really long, healthy life, and be able to look back on my life with satisfaction and happiness, having lived a life of meaning with deep relationships. I also strive to reduce the sum total of suffering.