One example out of many, is - we have guys here that I know do not factor in drive time to and from, each day, per employee. I am certain that after they attend a Vander Kooi seminar - they'll never price a job again without factoring in drive time!
All our bids have drive time in them. Some of our larger, multi-week projects have had many thousands of dollars in them just for drive time. It's amazing how many companies don't even realize how much money there actually NOT making on a project, just because of drive time. Comes right off your bottom line.
I attended a couple of them (Kooi) over the years. Very good.