Well motivation is always the issue. It's not enough to have bodies on the field I know it's going to sound a little unconventional but a nap or "siesta" after lunch actually improves productivity, motivation and overall welll being of employees. Many countries around the world like China, Spain and Italy have some type of "siesta" built into the daily work schedule. I actually started doing this myself when I was in the field and I noticed how recharged I would be when I came back from my lunch break. With a 40 minute nap after a lunch nearly doubled my productivity for the day