Llamas benefit from regular, short grooming sessions to remove debris and dead wool. If wool is allowed to matte, air circulation is hindered, and the llama is more susceptible to heat stress. This is true of short and long wooled llamas, although the long-wooled varieties will naturally have more of a problem. Regular sessions desensitize and train your llama, and also make it better prepared for final grooming required for show preparation. Long sessions of monotonous, often painful hair-pulling should be avoided. Start grooming your llama well before show season, and keep it reasonably groomed with regular attention.
There are probably as many different grooming tools and preparations as there are llama owners. The types of tools you will need to groom your llama will depend on the character of your llamas wool. A good source of grooming supplies is Quality Llama Products