Slow down and read everything out loud before you hit send. I caught a huge mistake that way last week, just by hearing how wrong it sounded. Sometimes your eyes see what they expect to see, not what's actually there. Taking that extra minute feels annoying but it saves so much trouble later.

Read a great article explaining how field curvature causes that exact soft edge problem.

Always check the cap first (learned that the hard way).

Three trucks on one street?

I once paid for expensive avocados as Hass when they were just the regular ones for a solid six months. My bank statement looked like I had a serious guacamole habit. The real kicker was I don't even like organic stuff that much, I was just being lazy with the lookup screen. Now I have the regular banana code, 4011, burned into my brain like my own birthday.