As an assistant at Texas, Harston's duties revolved around day-to-day coaching and practice responsibilities and opponent scheduling. Her primary focus was on coaching the Longhorn offense and handling the perimeter players.
Over her 18 years at Texas, Harston's commitment to the program resulted in helping UT to 14 NCAA Tournament appearances (including Sweet 16 showings in 2002 and 2004, as well as a Final Four berth in 2003) and eight conference championships (five regular season titles, three tournament championships).
An outstanding collegiate player, Harston had an impressive basketball career in her own right. A former National Player of the Year candidate while starring at AIAW national powerhouse Wayland Baptist, she was selected as one of the "Top 25 Players of the Pre-NCAA Basketball Era" by ESPN.com in January of 2006.
Harston was a Kodak All-American and a finalist for the 1980 Wade Trophy National Player of the Year award at Wayland Baptist. She led the Flying Queens to the 1977 National Women's Invitational Tournament (NWIT) post-season tournament championship and to a fourth-place finish at the 1978 AIAW National Championship.
After receiving her bachelor's degree in physical education (1980) from Wayland Baptist, Harston then earned her master's degree in education from North Texas State University in 1982. After a two-year stint at Texas Tech, Harston returned to the high school coaching ranks for a five-year stint at Plainview High School in Plainview, Texas. At Plainview, she was head basketball coach and athletic coordinator. Under her direction, Plainview won the Texas Class 5A State Championship in 1986-87, and Harston was named Texas State High School Coach of the Year. Two years later, Harston began her long association with The University of Texas.
Harston was inducted into the Texas High School Basketball Hall of Fame in 1996.
Additionally, on Feb. 24, 2008, Harston was inducted into the Wayland Baptist Athletic Hall of Honor for her outstanding basketball contributions and achievements.