Tips
1. Dress for the job you want. Keep your wardrobe simple. Patterns are not a good idea. Solid colours are best. They are more flattering.
2. Get a good night's sleep. It will make all the difference. No one likes to be or look tired it's not flattering.
3. Drink lots of water. You need to be hydrated. It will add to the good night's sleep you had. You will look fresh and eager.
4. Wash your face before you leave the house.
5. Arrive early. But not too early. That could cause a mess. 5- 10 minutes tops is best.
Tricks
Make a list of outfits you could wear. As the week goes by narrow it down to two. Then the one.
If you have facial hair shave three days to a week before. It will look more natural in your headshot. If you prefer a cleaner look shave either the morning of or the night before.