Back to the main subject (I think), the best instruction I ever had in this area was not from an instructor but from a safety pilot PPL checking me out in an Emeraude. We did about 10 simulated engine failures in various parts of the circuit, each time seeing what I'd do and where I'd go. By the time we got to circuit no.3 it was amazing how I'd tightened up my circuit...
..Interestingly this particular pilot had a bit of a reputation as a cowboy flyer, but I changed my personal opinion of him that day... he certainly wanted to keep all his bases covered, which can only be good.