Damaged ends! They make your style look tired and frizzy. The ends of your hair are the oldest and weakest. They have been exposed to the harsh environment and hair chemicals the longest. You need to fix the problem as soon as you notice or the ends will continue to split and the damage expand. To keep hair looking fresh from root to ends, follow these tips:

Depending on your style, the first thing you should consider is getting a trim. Just a 1/4 to 1/2 inch can make a big difference.
When applying your conditioner, start with the ends and leave it on for 1-2 minutes before applying to the rest of your hair.
Use a leave-in product on your hair ends that is made for repair. A good weekly re-structure and repair mask will make a big difference.
Always use a Thermal Protection Spray when using heat on your hair ends. Heat hurts hair! Think of how long your ends have had heat applied. (If your hair is 6 inches long, that's at least 9 months to a year!)