i dont like numbers 3 and 4. in my experience, basically every player calls single raises with basically any PP. On low flops described in 4, a lot of these players like to put you on missed overs and will probably call at least one c-bet even without setting up. However, on A, K, or Q high flops, i will c-bet a very large percentage of the time against one opponent. It makes calling with a missed pocket pair or a sc that didnt flop a monster very tough.

also, just in general, i dont like 'rules for c-betting'. i hope these are just general guidelines that you will modify based on your opponents and most importantly what you think your image at the table is. If you have raised 3 outta the last 5 hands and not shown down good cards you may not want to fire out with a missed AK. Hope that helps some.