Footage is what you got after a day of shooting (rushes). And basically, what to do with the footage you got.
In the darkness I watch the endless takes. Keep the editor near. Keep the actors out (a lot of bad things will said about them). This looks okay, but why the hell he blinked on this line! Another one, without blinking, is not that good. What, if wee keep the blinking shot, but cut on this goddamn blink to the reaction shot? So, we watch more. I do not remember, if I wrote anything about coverage and continuety, but those subjects are in every textbooks. You may not have this reaction shot, my friend. And never mind the technical waste -- bloopers are not funny, when you are a director, or the producer is watching the footage with you.
Always something is missing. And something is wrong. What to do? First, don't kill yourself over it, accept that it is a law of nature (of making movies). There are the pleasant surprises, too!
My advise, go after the key images; you need something to measure against. BTW, your crew and actors need those shots too!
At screenings you basically see how the final cut will looks like (must develop in yourself that kind of imagination). Don't forget to keep in mind the big picture (the whole movie), not only the individual shots. Keep correcting the shots that are ahead of you (make new and kill the ones you do not need in your storyboard).
You ask. Ask the people you trust. Ask yourself.
Whatever time is left in your daily schedual during this madness, make an hour for yourself to reflect. Step out, you need a distance to see. After the production is over it's too late.