4. Hide a Blemish
The picture-day blemish is one of life's certainties, but it's easy to remove them in PhotoShop with the Spot Healing Brush Tool (it looks like a Band-Aid in the toolbar on the left). Tap the button, then choose "Proximity Match" at the top, then tap the blemish... make sure your brush size surrounds the entire blemish, and it'll disappear. Woot!