Learning feats and class abilities

[ImperatorK]

I'm looking for suggestions and ideas on what training methods could warriors use to learn their various class abilities and feats. For example how could a martial arts master teach his disciple to perform Power Attack or Cleave? And of course I'm expecting something more than just "He's hitting harder". Lets assume, for the sake of this thread, that even Power Attack requires some amount of technique.
Bonus points for giving me some clever sentences that the mentor could use during the training.
Just pick some feat or class ability and give your idea an how a warrior learns it. Can be self taught or learned from a master, although I'd prefer the second option.

[weenog]

When you can balance a tack hammer on your head, you'll head off your foes with a balanced attack.

I mean...

[Garryl]

And why am I wearing watermelons on my feet?

[sirpercival]

When you can balance a tack hammer on your head, you'll head off your foes with a balanced attack.

I mean...

And why am I wearing the watermelon on my feet?  (This is the 2nd thread in a week with Mystery Men references.  Win.)

I think a problem you'll have with this is that a lot of feats have no real bearing on how stuff actually works in any visualizable way.  Take, for example, Combat Expertise.  It makes no sense -- parrying would be much more intuitive.

For Power Attack, you could interpret it as whipping your blade (or whatever) around at higher speed, getting more impact with less accuracy.

EDIT: Ninja'd.

[veekie]

Alternative for Power Attack, targeting high value targets like the face, neck, gut, etc, rather than going for basic center-of-mass attacks.