Good read. From article:

Asked about coaching his linemen at Iowa, Brian Ferentz said, “The blueprint for me is – I’ll steal from coach Belichick and our head coach (at Iowa). You prepare to be the best and you do your job.

“That’s the blueprint. Do whatever you’re doing as well as you can do it. If your job is to fill up water bottles, then fill up the water bottles as best you can. Somebody will notice that and you’ll do more than fill up water battles.”