If you haven't already, you might want to consider expanding your client base — demographically speaking, that is. According to a study from Celent Communications, the purchasing power of minorities, along with their disposition towards investment, will increase dramatically in the next four years, to $1.3 trillion. Here's a look at which groups are rising the fastest (numbers are in billions).

Race 2000 2002 2007*
African-American $589 $ 646 $ 853 U.S.
Asians $255 $ 296 $455 U.S.
Hispanics $ 491 $ 581 $ 926
American Indian $ 36 $ 41 $ 57
*estimated