The time-wasting techinique I noticed most was driving from one end of the congregation's territor to the other making return visits. No one consolidated their calls by region.
Right on Blondie - but you forgot the need to stuff 6 people in the mini van and the ones in the back with no calls get to count 3 hours without ever getting out!
So if u do the math - 1,000,000,000 hour divided by 6 divided by actual 15 miutes of witnessing per morning = 138,000,000 actual hours in service.
Maybe the Mormons actually have it right - at least they go to some houses every day.
Just my Opinion
Jeff