I've learned that regardless of how I feel at any given time I must be diligent and consistent with my management system and regimen. It's a bit like stopping the med's when you feel better! DON'T DO IT!
I've also learned that by maintaining my mood journal I can spot the trends and detect a change of state much soon. It has also proved to be an invaluable diagnostic tool with my pdoc and was in fact responsible for my change in Dx.
I herald you on the lifestyle changes you have made; I've made some similar ones, most particularly a significant reduction, almost elimination, in alcohol consumption.
Use ALL of the management tools at your disposal, including PC, and I'm sure your stability will continue to improve.