Here are some standard advice and list for stuff to remember for models prior to a shoot 

If you are here because we will soon be making history, be sure to agree to the terms of the model release in advance. Don't leave this to the last minute to discuss - always clear the terms in advance (TFP/Payment/Use).  Let's get started!

• Arrive at the session on time. It is recommended to be there 10 minutes before the scheduled time. In case you do not purchase the package with makeup remember to be already made up as you have an allotted time.
• If you purchased the makeup package bring your face clean, if it includes hair it does not have to be wet, preferably wash it in the evening the day before the session.
• If for some reason you are unable to attend, notify the photographer immediately to minimize the damage. A photographer may have done some advance planning, preparation, or invested money by reserving a space to shoot and now will need to take care of those arrangements. It's unfortunate when shoots have to be cancelled, especially last minute, and it can make a great deal of difference for the photographer to know well in advance. 
• If doing nude or lingerie shots make sure you wear loose fitting clothes at least a few hours before the shoot. Stay away from jeans, tight undergarments, and tight fitting jewelry. These things will leave clothing marks that take a long time too dissolve. The best outfit to wear pre shoot is a loose fitting dress. To be comfortable between shooting and changing of sets, bring a bathrobe or kimono. This helps keep you warm during winter and prevent your skin from becoming blotchy.
• If shooting nude, make sure to set your limits in advance and communicate them to the photographer. The photographer's idea about what a nude shoot is may not be the same as yours. The session will be more relaxed if both the photographer and you know what makes you feel comfortable and how to pose for those limitations. It's YOU are in the picture so YOU have to define the limits.
• If you are inexperienced, you will have assistance all the time, but it doesn't hurt to make sure you know beforehand how you want to pose. Take the time to train poses and facial expressions in front of a mirror. Look for magazines or photos on the internet, for example on tumblr/instagram, that mimic the posing style you are comfortable with, or you can also check the references at the end. Use these photos as inspiration.
• If it's your first time and you're still nervous, contact models the photographer has worked with before and ask them about their experiences. Don't be afraid to ask a photographer if they have references and where. If you're still not sure, ask if it's okay to bring a friend (it's important that you feel comfortable and not shy with the person you choose to bring with you). As a last resort, your boyfriend or partner is an option. Even if your partner is okay with what you are doing, you may feel a little shy and, potentially, the photographer may also be affected. In either case, the quality of the image will suffer. If you decide to bring your partner, discuss with them beforehand what the proper etiquette would be for them as guests at the session. Your partner may be waiting in another room during the shoot.
• THE DAY BEFORE THE SHOOT, GO TO BED EARLY AND DRINK WATER. Models who are hungover and tired or with bloodshot eyes mean you are unlikely to perform to the best of your ability. This would be a waste of time for all parties involved, as the aim of the shoot is to have the best of both parties' talent and ability. 
• If you need to shave/wax do it as close to the shoot as possible (hair stubs rarely looks good in the pubic area), but with enough time for your skin to calm and ease the irritation. Also make sure to attend to eyebrows the day before. Don't forget to apply lotion and generally clean your skin in advance.
• Pay attention to your nails and toenails. For lingerie or nude shots in black and white nail polish or fancy patterns will often look odd, but for glamour shots it could be great. Talk to the photographer beforehand about what you prefer. 
• If you have not yet sent references of the photos you would like to have, don't waste your time, DO IT NOW!!, maybe the photographer has another idea of what you are looking for and it is not the same as yours.
• Don't go to a tanning bed for two days prior to a shoot (your skin can have a strange color for up to 48 hours). Don't spraytan a week before. Personally I recommend not to use artificial tanning at all.
• Don't starve yourself the day prior to a shoot to look thinner, you will need the energy, and besides Photoshop and good lighting can make you look your best. If you are worried about bloating, research foods that will help ease that but also keep you feeling full and have energy.
• COVID-19, For your safety and ours, only the people who are going to be photographed can go, in case of being a single person, you can go with a maximum of one companion.