Singer/songwriter/guitarist William DeVaughn had a million-seller the first time out with his inspiring "Be Thankful for What You Got." Those who first heard the smooth track thought it was a new record from Curtis Mayfield. DeVaughn's high tenor does bear some resemblance to Mayfield's and the simple, encouraging lyrics were similar to the kind found in the catalog of the Impressions leader. "Be Thankful for What You Got" also found its way onto the playlist of some gospel radio programs. One of the lyrics: "Diamond in the back / sunroof top / digging the scene with a gangste...