I've posted a few examples from the feature film KERBEROS of using color correction and grading to improve shots.
Though shot with care on an EX1, nearly every shot from cell phone video to RED ONE can be improved with post production techniques.
Here are a few before and after examples pulled from the film and with a basic guide/tutorial on using desktop tools on your own footage.
Hope it helps!
Color Correction examples with tips and notes
CC and Image manipulation basics (maybe a bit more than basic! but still just the start)
( some non apposite links removed - mw )
good luck to all!