I was reminded recently of the importance of always having a plan B. I was photographing a 3 month old and her mom. I had set up a one light shot right in the living room. I set up my stand and light, put up a soft dark blanket as the background and we put baby on stage!
I bring this up because when I saw how short a window there was of a happy baby, I quickly thought of a plan B so I would not lose the entire shoot and have to reschedule. Always think of a plan B, C, D etc. It has happened to me more times than I can count. It is always great to go into a situation with a general plan, but sometimes the situation you walk into isn't ideal. Tricky subjects, equipment malfunction, lighting problems, etc. BE PREPARED FOR ANYTHING!