I was told by a very wise athlete "never try anything new on race day". The same rule applies for your makeup before a photo session. Now is not the time to try fake eyelashes (unless applied by a professional) or do a spray tan, or get your eyebrows waxed.
1. Start off right. That means get plenty of sleep, drink more water than you think you need, and exfoliate your skin and your lips.
2. A few days prior to the shoot is the time to think about your pearly whites... - I highly recommend the generic CVS or Walgreen's advanced whitening treatment, the strips stay in place better than some of the name brand white-strips I've tried.
3. Use a primer. This will smooth out your skin and allow your foundation to glide on easily and stay put.
4. Stay away from mineral makeup. Mineral foundations are typically loaded with ingredients like mica which reflect light like mad - imagine a thousand glimmering specs all over your face.
5. Choose a concealer that is no more than half a shade lighter than your foundation.
6. To camouflage a zit, tap a bit of concealer right on top of it with a synthetic-bristle brush, don't sweep it back and forth as it will simply build up around the blemish.
7. Keep your makeup color choices neutral. You want your photos to be timeless and your natural beauty to show through. No room for regrets with a classic and clean approach.
8. Make sure you have given yourself a fresh manicure and keep your nail color neutral.
9. Use oil absorbing sheets to blot shine throughout your shoot rather than applying numerous layers of powder.
10. Apply your makeup with a light hand. Nothing is worse than having people notice your eyeliner instead of noticing your eyes.
11. Use a moisturizing lipstick or a tinted balm in a color than enhances your natural lip color.
12. Most importantly, top it all off with a beautiful and sincere smile.