What is something that most people do the wrong way but that you definitely and positively do the right way?

(Let’s allow that “most people” just reflects your observation and not a statistically valid global survey.)

What is it—and what’s the right way to do it?

And do you ever give others the benefit of your knowledge of the correct procedure?

 
Tags as I wrote them: process, helpful correction, rightness, your doin it rong.