I have a similar story to yours. I had a "plan" in the last bullrun which I followed very badly and didn't take enough profits because I was way too greedy. I can feel how my years in the market (and years in my life) have made an impact on how I invest, being much more down to earth than before. What I plan on following is a gradual sell-off as prises rises, you could call it an inversed DCA.

However, I believe the hardest is not creating a plan but sticking to it. Hopefully we can stay strong to our plans!