If you choose to add color to your extensions, either initially or at a later date, be sure to work with the same stylist - they know the precise method they used on your extensions and can offer the best result with other styling services.
Your stylist will also give you quality advice on when touch ups will be necessary and what conditioning and cleansing agents will be best for color maintenance to keep your highlights perfect, whatever your hair highlighting ideas may be.
If you're ready to add layers to your style, seek out the better salons in your area and book a consultation with a Master Stylist, who will likely have the knowledge and skill to work with your long hair and new layers with confidence.
If you have your hair chemically relaxed, make sure you discuss the best shampoos and conditioners for your situation with your stylist; some leading black hair stylists recommend Nexxus hair products as well as the Dudley product line.
At the same time, many regular salons offer extensions, and as long as you find a reputable stylist willing to work with you to create the best style possible, you are sure to have a positive experience and enjoy your new longer locks.