After you get your hair highlighted or have color applied, the products you use on it are very important. If you love the look you've got then you'll want to take special care of your color-treated hair. Any process you get involving the use of a developer such as: highlighting, lowlighting, or a solid color application is considered "color-treated hair". Your hair is color-treated until it grows out or you get it cut off. Some of my clients have processed their hair for years for gray coverage and others color only occasionally. No matter how often you get color or highlights, remember to pamper your hair.
Always, use products that specify they are for color-treated hair, these help to keep your color from fading. Keeping the ends trimmed regularly will help keep the hair from looking dried out. There are many brands that offer their own line of color-treated hair products. The professional salon products are best, but you can also buy some awesome products at a discount store. Just make sure the label says, safe for color-treated hair.
Keeping your ends trimmed regularly is

also important because the color or highlights can really dry them out. When you trim off the dry ends it keeps them from tangling together and breaking off. This is also going to keep your hair-style looking beautiful and healthy.
The sun and tanning beds can have an lightening affect your on your haircolor or highlights, so you should always try to cover you head when you're outside if possible. Many professional salon product lines offer a color-protector spray, that you spray on like hair-spray and it acts as a sun screen for your hair. These products are very effective and are worth the money, since they protect so well.
The more you color-treat your hair, the more chemically treated it becomes. So when you need your roots need re-done just color the hair that needs color, not the whole head. The color can be put on the rest of your hair in last remaining five minutes of the color process. If you have been getting highlights over highlights and your hair is too blonde, you might consider getting lowlights instead. Lowlights are done just like highlights, but using a dark blonde or brown. This can really bring back some definition to your worn out highlights and give them a healthier look.