Well, it's not all that different from photography. I did photojournalism before I got into filmmaking. Most of the stuff, as far as F-Stops and ISO, are the same or similar. The only thing you can't control is shutter speed.
If you are filming on the beach, an ND filter is deffinitely reccomended. A gray card will also help you with lighting, or just any shirt or towel that is about 85% gray. And bounce boards could assist you, as well. You could even color them for a desired effect (just take a red or green or whatever sheet and staple it over a large piece of sturdy cardboard and you are done).
Hope that helps.