Applying lean development principles to workouts

C. Iterate quickly based on feedback from your customers. Repeat as necessary.

When I read this I thought he was going to tell us that he would work out for a week, then go out to bars (topless?) and get feedback from girls, and then alter his training routine accordingly... ;)

Look into HIIT and machines that recruit higher percentage of muscle mass so your body can multitask. Versaclimber is a good one. So's Skier's Edge Big Mountain or Concept2 rower. ROM is overpriced and weird.

You can get peak results--any more time yields diminishing returns--in 7 to 10 minutes three to five times a week: 3 mins warmup, 3 - 5 mins at max†, 1 minute cool down. Then walk it off and try not to throw up. Protein and creatine juice 30 mins before and protein shake 10 mins after doesn't hurt.

† Footnote: Max means near your max heart rate. When you do HIIT right, you're going to feel like you want to die. Best to use Polar chest strap or other real time heart monitoring to track your zones so you can mentally coach yourself to stay in the peak zone. If you can't hit peak heart rate after just a couple cycles of 20s max 10s rest, your machine isn't recruiting enough or you're not exerting enough.

other than that, general crossfit programming is superb to anything else i've tried - the average crossfit.com WOD takes 10 minutes or less to complete if properly scaled and will leave you completely gassed.