What would be the best and worst decisions that your characters have made, especially your lead ones? Do they learn from their mistakes? How do they handle the fallout?
Often with decisions, it is a question of making the best judgement possible based on available knowledge at the time. Sometimes the best decisions come as a result of taking time out to take stock and reflect (that word again!), and/or seeking advice from others. Do your characters do this? If so, what is the impact on them and your story?