The Bardock Saga This is the saga about Goku's father. More so a summery of the TV Special.
The Vegeta Saga This is the saga when Vegeta and Napa arrive and fight the Z fighters. Includes Raditz saga as well
The Frieza Saga This is the long saga with Frieza, Zarbon, The Ginyu Force etc. Also where Goku goes SS. It's one of my favorites!
The Cell Saga This is the Cell and android saga. With #17, #18, TrunksThe Buu Saga The saga with Fat Buu, Majin Buu. The one where Vegeta sacrifices himslef. Etc.
The GT Bebi Saga This is the first saga af Dragon Ball GT. When Bebi goes around possesing people. One of them being Vegeta......
The Shenglong Saga This is the saga where the seven evil Shenlong dragons come into play.