A few days ago I published a video on perfectionism and not waiting for conditions to be perfect before starting the work.
The way this usually manifests itself among PhD students is that they spend far too long "reading more" in preparation and missing out on gaining practical experience.
In order to break my own bad habits, I've set myself the challenge of recording and posting a short video every day for the next 60 days. They won't be perfect, but by making small improvements every day they can get a lot better.
Even doing these very simple videos, small unexpected challenges come up. But because I'm not over-complicating things and am accepting imperfection, they are manageable!