Yesterday I had the luxury of being able to plan how to photograph the organised event I would be shooting by actually going to the event. This was because it was a weekly market of food that occurred each Saturday near to where I lived.
I was able to line up shots at certain angles and decide which focal lengths I would probably use for these shots.
There were many people there, more than I had expected so I factored that into my shot selection for the next Saturday.
I also noted the times for setting up and closing so I could maybe use this to take certain shots when there weren't many people there for simplicity or the opposite for atmosphere.