Members of Bardock's crew: Borgos, Fasha, Torah, and Shugesh (as in the Bardock Movie)

Krillin is a year older than Goku

Bulma, Yamcha, and Tien are four years older than Goku

Nappa wanted him and Vegeta to repopulate the Saiyan race by having children by Earth women, and thus have really powerful hybrids

Vegeta turn the offer down because he didn't want a lot of "ingrate brats" running around with powers greater then them

Nappa first thought that Vegeta wanted to bring Raditz back to life with the Earth dragonballs

Piccolo's "Special Beam Cannon" is called "Light of Death" in the English manga

There has been at least four different English voice actors for Goku

In the Frieza Saga, Vegeta wears Saiyan armor that's out of style (Vegeta arrived at Frieza's ship looking for the dragonballs)

Gohan has saved Vegeta at least two times by shoving him out of the way/taking a blast for him.

In the Frieza Saga when Goku is traveling to Namek, he said "I'm a feather!" right after turning off the extra 100g. (This looks really funny in the manga, vol. 7)