My dad told me to leave the house 10 minutes early on rainy days, and I fought him on it for a year
Turns out those 10 minutes are the difference between catching the 7:15 bus on 5th and watching it pull away in the rain, so now I'm the guy telling everyone at work to do it, and I'm wondering what other dumb advice I ignored because it came from him.
The "watching it pull away in the rain" part is the real lesson. It's not the 10 minutes that saves you, it's how much worse the failure feels when you're getting soaked. That gap between barely making it and missing it by seconds is where all the dumb advice lives.