You are so lucky to feel so energized and positive.

I keep trying to get there but not many postive things happen to me, so I don't have many good, positive memories to choose from. It sounds like a good idea.
I do try to do that with my daughter. Her father "kidnapped" - he's a lawyer with many friends in the justice system and divorce courts - her from me when she was 9. I was able to start talking to her again when she was 15 but things were never the same, she was brainwashed to not like me.
I tried and thought we were making progress but 6 years ago she suddenly stopped talking to me and I have not heard from her at all since then.
Sometimes I try to reclaim the memories of my little girl that loved me. It works sometimes, I think it is starting to work more often as time goes on. At first I couldn't think about her at all without breaking down.
About 6 - 8 months ago I decided to own my good memories of MY little girl, the daughter I knew. Not the one who was formed by her father and some others who disliked like me so much. If I'm missing her too much it doesn't work, I just feel the loss more intensely by thinking of those good memories. But if I'm in a more stable mood, in a more accepting-of-the-way-things-are-now mind frame, I can think of those good memories and feel like she's mine again.