Why is everyone mentioning "being certain of making the runway"?
When the reduction of just a few RPM of power is enough to land short, in most/all aircraft an engine failure is extremely likely to guarantee it!
I also argue the point that full flaps means you are committed to land. Going round is always an option - even after the flare/bounce/wibble.
As for the throttle/IAS/Aimpont debate, I've done it both ways, and the Air Force method is simply easier. However, if your own technique works, and you are happy with it, then fine. It can't hurt to have someone show you another method sometime though.