Found this series of videos by Grant Abbitt and I think they are pretty good. The use of constant detail, refining the shape and then cranking the detail up seems to be very logical and perhaps not what I was doing before. Also |Grant does a good job of showing you the finished product at the start of the video and his videos are clean and concise. Videos where you don't see the results until the end are a peeve of mine.
Time to make an Easter Island Head.