13. Not Blending Makeup Properly

Poorly blended foundation, blush, or contour can leave visible lines and streaks that harshly define features and inadvertently add years to your appearance. Harsh edges disrupt the natural flow of the face, making makeup look obvious rather than enhancing.
Using quality blending tools—such as damp sponges or soft brushes—ensures products melt seamlessly into the skin for a smooth, natural effect. Take your time to blend each layer thoroughly for a fresh, youthful result. For step-by-step techniques on achieving a flawless blend, explore Glamour’s tutorial on makeup blending.