Some years back, before I sold my business and retired, I tried something and I've stuck with it ever since.

I pretty much never say 'should', in the sense that someone 'should do' something. Instead, I use the word 'could.'

"Well, you could try doing it this way."

"As you're not having any success with this method, you could use this method."

The difference in responses was great enough for me to develop the habit and stick with it. I'd call it a success.

There are other things I don't say. I don't say "I understand." Instead, I say something similar to, "I can relate." Again, the differences in responses that I get from people have made it worth developing the habit.