Rule #1: Static shots.   Zooming, panning, craning, trucking, are what ruin most amateur filming.  
Rule #2:  Make sure you dont' have the subject backlit.  Film with the sun at your back. 
Rule #3:  Microphones on cameras usually suck, and they are prone to picking up the cameraman's breathing more than anything.    Invest in a pocket digital recorder and put it outside the blind to record the ambient sound.