I saw a video some time ago by C-Dub indicating that there was no such thing as playing by ear. I found it very interesting and watched the whole video twice and read all the following comments from forum members. After all of that, I was still somewhat up in the air about his comments although I saw that what he said made a lot of sense for practice. I wrote out one of his proposed practice routines(the one for the key of "C") and tried it. It was similar to practicing a randomized scale of chords with some single notes in between.
I wondered if C-Dub still visits this forum, and if so, if he has a chart of the sequence of chords for each key. I enjoyed playing them, but it is sort of difficult to write all the chords for each key by watching the video. Seems the chart would be marketable if available. If it is, I wpuld like to know.