I suppose it depends on which part of perfectionism is hurting you.

I struggle with starting. I think I can't accomplish the perfect result I envision so I find myself paralyzed and unable to begin.

To help with that I remind myself of the Pareto principle. If I can accept that I may get MOST of the way to my goal on the smaller portion of my effort, I can usually get started.

The next struggle is finishing things, running into barriers and deciding to start over instead of overcoming them, or moving on to a different project. I don't currently have strategies for that unfortunately.

It's hard to break these mindsets and habits.