First Commercial Shoot as Crew Member. Advice?

First post on this sub! I'm traveling to NYC this weekend to assist with a commercial calendar shoot. Normally I shoot travel and portraits, so I haven't worked with a production company on a crew before (they're aware of my experience level). I'll just be assisting with the models, labeling cards, holding lighting, etc.For those of you who have worked on a shoot like this, do you have any recommendations? Wear comfortable footwear, ask questions, offer to do x, etc? Expect chaos... I know. Thanks in advance for any advice! via /r/photography https://ift.tt/2w5OaKZ