Everyone has the best tips. They’ve already posted them online. Here my three more, probably good-enough random tips for model photography.
1 — Make things comfortable with essential goods.
While your model may work for free, cash, or prints, providing essential comfort is always a plus. Having water to drink (preferably an unopened bottle or two, or some tea/coffee — depending on the shooting site temperature), something sugary to eat (e.g., chocolate, cookies, or an energy bar) to compensate for the effort or the temperature loss if the model stays immobile for a long time are a good start. Also, think about having a plaid or cover at hand (your model will probably not want to catch a cold, or cancel her upcoming professional schedule because of a runny nose). Disposable slip-on shoes for in between shots are a nice touch too; they can make a cold-floor or weird surface situation feel way better regardless of air temperature. Your model might have prepared, you should also, just in case.
2 — Keep a polite distance with your model.
Not speaking of your long-time-became-friend models, but most will feel more comfortable working with someone who keeps a respectful distance during the shoot. Don’t be scared of not looking friendly enough; you can express that differently (e.g., by providing the basics like in point 1). When the shoot needs you to get physically closer, ask first, explain what you want to do before you do, and wait or even better ask for a clear answer. Independently of the level of experience of your model, if things get more comfortable for her/him, she/he will eventually tell you.
3 — Be informative on what your work is for, of its opportunities.
You can have all your models sign an agreement form, but first, explaining the goal of your shoot will always make it a smoother experience. Don’t hesitate to say if the shoot is experimental, or for practice. Having the first shoot as a way to get to know each other and how to better prepare for future projects can be an essential strategy. Should the results of your work be used for something else in the future, prevent future disagreements on image use by talking about the eventuality, and how you’d see possible rights or royalties, and how you will get the information through. And don’t bullshit.
You can always check some other photographic examples on my Instagram page.