1HBH Rocks
Semi-Pro
I found this video from a USTPA coach who explains very simply, but also very visually why most amateurs struggle with consistency. The guy gives some tips anyone could think of on here... that part isn't that much unusual, nor peculiarly more interesting than the dozen of other videos we can put up links to. What's so nice is the visual support he gives because he's stunningly good at faking mistakes to illustrate his points:
http://www.youtube.com/watch?NR=1&feature=endscreen&v=T2eAIoG9O8I
The lesson is that good footwork and good preparation allows you to hit the same strokes every time -- which is easy as opposed to hitting dramatically different strokes because you moved or have prepared too poorly. Anyway, the video is worth seeing just for the exaggerations he make of hitting late, too early, not moving, setting up poorly, taking too huge a back swing, stopping with the racket behind your back, etc. If you get to explain people why they should work on doing things right, I think this video contains good visual pieces that might support your points.
http://www.youtube.com/watch?NR=1&feature=endscreen&v=T2eAIoG9O8I
The lesson is that good footwork and good preparation allows you to hit the same strokes every time -- which is easy as opposed to hitting dramatically different strokes because you moved or have prepared too poorly. Anyway, the video is worth seeing just for the exaggerations he make of hitting late, too early, not moving, setting up poorly, taking too huge a back swing, stopping with the racket behind your back, etc. If you get to explain people why they should work on doing things right, I think this video contains good visual pieces that might support your points.