Morrowind Cheats

In the Xbox version of Morrowind, there are cheats to keep your health, magicka and fatigue up to par:

Restore Health

Highlight your Health at the stats screen and press:
Black, White, Black, Black, Black, then hold A.

Restore Magicka

Highlight your Magicka at the stats screen and press:
Black, White, White, Black, White, then hold A.

Restore Fatigue

Highlight your Fatigue at the stats screen and press:
Black, Black, White, White, Black, then hold A.

Auto-Restore Stats

You can also have any of the above stats automatically restore themselves. Simply press the B button while still holding down A after entering any of the restore codes. This will close the menu, and have the stat continually regenerate until you open the menu again. Unfortunately, you can only have one on auto-restore at a time.

Having your health automatically restore is the most beneficial, since it makes you nearly invincible. (Nearly, because it's possible for one hit to kill you, or for multiple enemies to hit you faster than your health can regenerate — especially at lower levels.)

The automatically restored Magicka is quite useful when leveling your skills, since you can repeatedly cast spells without having to heal.