recently I started to write a worklog. I.e. Whatever i work on, i was just putting there on a daily basis.
Eventually writing self-reflection became extremaly easy because I had everything in one place at the end of H. Then it became a good habit in general - I became better organized, i was planning ahead, had better 1:1s with manager etc.
So to keep it short, i have started a pet project for that. It s not released yet and i want to conduct some initial feedback.