The night before a headshot, it's important to take some steps to prepare so that you look and feel your best during your session. Here are some tips on what to do the night before a headshot:

1. Get plenty of rest: A good night's sleep can help you feel well-rested and alert during your headshot session, and it can also help improve your appearance by reducing under-eye bags and puffiness.
2. Prepare your outfit: Choose your outfit ahead of time, and make sure it is clean, pressed, and ready to go. You may want to bring a few options in case you change your mind or the photographer has suggestions.
3. Wash and style your hair: Wash and style your hair the night before your headshot session so that it looks fresh and clean. If you plan to get a haircut, it's best to do it a few days before your session to allow time for any adjustments.
4. Clean and moisturize your face: Wash your face and apply a moisturizer to keep your skin hydrated and healthy-looking. Avoid trying any new skincare products or treatments, as they can cause reactions or breakouts.
5. Avoid alcohol and salty foods: Avoid alcohol and salty foods the night before your headshot session, as they can cause dehydration and bloating, which can affect your appearance in the photo. Jump to what should I eat before a headshot for further reading.

By taking these steps the night before your headshot session, you can help ensure that you are well-rested, prepared, and looking your best.