1. Damaged, over processed hair. If you have a few hours, splurge on a salon scalp treatment. These blissful treatments immediately work wonders on damaged hair, and are much more than a quick fix. A good treatment will start your hair on the road to recovery in addition to making it look healthier in the moment.

If you don't have the time or money to get to the salon, opt for a deep-conditioning hair masque, which only requires half an hour. You'll see instant change. Shampoo and condition post-masque and your mane will shine with new life.

When styling, use an ionic or tourmaline dryer and a ceramic flat iron or curling iron to prevent style damage. Blow-dry on a warm -- not hot -- setting, and avoid exposing hair to heat once it is fully dry. This is what causes further damage and breakage, which will only make things worse.

2. Limp, stringy hair. The most obvious answers are often the most effective. That is certainly the case with flat hair. Wash with a volumizing shampoo and condition only the ends. This will make an immediate difference; the less product you put in your hair, the less weighted down it will be. Blow it dry with a vent brush or your fingers, lifting at the roots, and focusing the airflow close to your scalp

3. Dry, frizzy hair. The key to helping dry hair is to condition, condition, condition. Hair is usually driest at the ends, so be sure to focus there, along with any visibly dry patches. Even if you don't use a leave-in conditioner, let it sit in your hair for at least five minutes before rinsing. Rinse it out by concentrating the water on the crown of your head rather than the ends. Once out of the shower, pat hair dry with a towel because rubbing it dry will only exacerbate the problem.