Try the Kodak Zi8...its a good quality cam that can fit into a pocket and for $130 it does 1080p with batteries that last up to 1:30 hrs...and sd up to 32 gb...so you are less limited in catching action...plus it has a mic input so you can get better sound quality...this one is the only pocket HD cam worth having.
Best advice I could give you in making a mini-doc is to watch a bunck of them and make an outline based on the formula you like best and follow it.
