My loupe habit made a big difference with film camera fixes

I used to skip using a magnifier on small screws to save time. Now I always grab my loupe before touching any tiny parts. This simple change helped me spot problems I used to miss. Last week, I found a hairline crack in a shutter blade on a classic model. Catching it early meant a simpler fix and a happy customer. My error rate has dropped since I made this a rule. What small step has improved your work lately?