Roll for Hit Points
Your character's hit point score represents his ability to
survive injury. The higher his hit point score, the more damage he can sustain before dying. Characters who survive long enough to gain a good deal of experience typically gain more and more hit points; therefore, an experienced character lasts longer in a fight or other dangerous situations than does an inexperienced character.A character's profession (his character class) dramatically affects the number of hit points he receives. Fighters and dwarves receive a lot of hit points. Magic-users receive only a few. The other classes receive a medium amount.
Home Brewed Rule
Select the "reroll ones" option when rolling for HD gain. If you click on the blue link for rolling HD on your character sheet, the dice roller page comes up with pre-filled selections. Just click roll the dice.