Tutorials/Help on foreshortening/perspective

hmm, anyways well I’ve havn’t really posted anything yet but heh I draw occasionally and hmm I am ok with it cept can’t really color hehe but I am more concerned on those really different angles where you need to consider alot of foreshortening and the perspective and yea I was wondering if any of you have seen any tutorials. Better yet, haha direct help is fine.

Here is what i mean.

This piece might not be the best piece of art, but the guy who does it does some really nice brush strokes for the concept, that captures the mood and such.
Something here, where u gotta pay close attention to the angles/ proportion and like foreshortening =P I’ve tried and usually make like the “fist” (main focus, or part that is close up) way too big compared to the others.

Thank you =P