It's my obligation to take out all the 'wrong' pictures.
When you shoot, that is opportunity number one to make a statement. When you edit, you have opportunity number two to make your statement. It could be an affirmation of your first choice or could go off in another direction.
If you can capture the element of surprise, you're way ahead of the game.
Always shoot it now. It won't be the same when you go back.
It's a lot easier to take pictures if you always have the camera with you.
Always wait for the trigger. The trigger is the final part of the puzzle, the reason you want to shoot.