Raging
Well having played a Barbarian through the first year and a half of my D20 experience I found that holding back on the rages is quite silly. Getting them out early in a combat is very important, why because you get the extra Hit Points.... If you take it in the Middle or close to the end of combat, and you lose a substantial amount of Hit points, then you drop out of Rage you could go below zero hp, or even worse, DIE. (almost happened to me twice)
Raging could be a role playing facet that your characters could use, mine was a hatred of ORCS. Halma would go into a rage when ever he saw an orc no matter how many there were.
Now I do remember that my first few adventures with Halma I would forget to rage often. One of the other players would mention that Raging was an option (Wulf Ratbane, or "Mr. Obvious"). But "role playing" wise I hadn't seen any Orcs yet, so I played it off with that.
It really is up to the player when and where to rage the Barbarian, but little prods here and there are not bad... They won't forget that often once they get into the character.
Raging in my mind is what makes the Barbarian one of the Toughest characters for 6 - 10 rounds (Which is how long most combats last anyway) +4 Str. +4 Con +2 hp per Lvl +2 Save vs. Fear -2 AC.... No brainer in my book....
But it can also lead to trouble......
Halma --- The Dead Barbarian.......?