Ronin what I was talking about was just principles and ways of generating power.Believe it or not it helps alot(for training purposes only).
The traditonal horse stance Shaolin drills helped me develop great rooting, leg strength, waist rotation power, and punch power.
Yin and Yang in this sense is simple, and not subtle or in-depth like in soft arts.Yang is the aggressive male side, while yin is the female/passive side. Punch out is the yang, and hand coming in is the yang. If you don't understand chinese philosophies and principles and how they apply to MA, then don't worry about it. As I said the palm facing upwards, eventually faces down (when punch is complete), this creates corckscrew force, and is very basic.The hand coming back you use to pull and simulate also exploding your waist forward (while thep pull hand side comes back)
In a fight, it is incorrect to have one side too much yang and too much yin, you want to have about a 60-40 distribution so that one hand isn't always all the way back while the other strikes, and it can't be exploited or used against you.
Other then everything else said and done, have fun, practice however you want