I have had success following custom plans by
@DopeyBadger who developes plans for continous and interval runners. Although I like the Galloway concept, I do better with running a few more miles during the week and not just a very long run each weekend.
For example for a peak half marathon training week, instead of a Galloway Monday 30 minutes, Wednesday 30 minutes and Saturday 14 miles, I would run something like Monday 4 miles, Wednesday 6 miles, Friday 6 miles, and Saturday 8 miles. The concept is called cummulative fatigue, where my Saturday run is on still tired legs.
Perhaps Billy can link some of the thoughts he has previousely posted.