How do you improve common mistakes when working with Prompt Help?

On How do you improve common mistakes when working with Prompt Help?, the part about common and mistakes stands out to me. I would test one small workflow first, keep the variables consistent, and compare the result before changing several things at once. That way you can improve the workflow without losing track of what caused the improvement.

I think common and mistakes is the key part of this topic. A practical approach is to define the outcome you want, test it with a small example, and then check quality, speed and reliability separately. The original point — "I have been exploring Prompt Help and wanted to ask people who have tried it in practice. I am particularly interested in common mistakes and evaluation. I would like to compare a…" — gives a useful starting point for that comparison.