quote Eve B Hart

You go from evil to good by earning as many good points as possible and as few evil points as possible. Complete the good versions of quests (if there is a choice) and kill bandits and other evil critters in the game. Donate to the Temple of Avo.

There are three ways to get an age reduction:

A) Don't age at all. Seriously. You age by .7 year each time you level up a stat. To stay young, don't spend your experience. Likewise, if you get an age reduction from either of the methods below, if you continue spending experience, you will age again.

B) Sacrifice to the Chapel of Skorm to get an age reduction. You must make your sacrifice at midnight (the more evil you are, the more precise you have to be with your timing). You can earn up to 10 years off your age, and if you use the hero save exploit during the Darkwood Trader Escort quest, you can earn even more than that.

C) The Temple of Avo is similar to the Chapel of Skorm in that you can earn up to 10 years of age reduction by making a sacrifice (and more, if you use the hero save exploit during the first Archaeologist quest) But this time around, the sacrifice is money. Give them enough money at once, and they'll give you youth (and possibly a weapon and a title). Good characters require around 400k gold, whereas evil characters require around 33k. But I discovered a trick to help you avoid having to give up all that well-earned goal:

1. Save before doing this, in case you don't get it at first.
2. Activate the temple font.
3. Donate all of your gold.
4. Hit A.
5. Immediately after, before the gold drains from the money bag in the corner, activate the temple font again.
6. Donate 1 gold piece.
7. Hit A again.
8. Donate 100 gold piece.
9. Hit A again.