Occupation: While for most PCs, the general job description is either "adventurer," or their class, what does your character think that their role in life is?  Examples might include "defender of the faith," "ward of the people of haranshire," "professional treasure hunter," "semi-retired adventurer," "revolutionary," "mercenary," "bodyguard," "scholar," etc.
Personality: This refers to nonphysical traits associated with the character, mainly behavior and temperament.  Some examples are generous, humorless, cruel, optimistic, altruistic, aloof, vengeful, cruel, studious, tactless, morose, etc.  You should already have a pretty good idea of what personality traits define your character, though you may wish to include traits that don't normally show up during the game.  If you need more help choosing traits, there is a list in the DMG that may be helpful.
Appearance: Once you've had a few epic interludes under your belt, chances are you'll be noted by bards, etc., concerning your general appearance.  This includes not only your hair, skin, and eye color, but also height, build, manners of dress, any items you normally (or even always) carry, and so on.  Start this list with what a person would immediately notice about the character; finish it with things a person would notice after studying the PC for a while.
Distinguishing Features and Habits: Personally oddities or quirks that might not be immediately noticeable.  This can includes physical traits such as buck teeth, tattoos, birthmarks, and scars, or behaviors such as favorite expressions, nervous habits, patterns of speech, etc.
    Just for fun, I also like to record memorable lines spoken by a character as they occur.
Tastes and Preferences: This includes the PC's hobbies and leisure pursuits, favorite foods, favorite colors, collections, pets, etc.  This category also includes things your character doesn't like: activities your character finds distasteful or boring, foods the character refuses to eat, animals you don't like, etc.
History: This includes pertinent background material (your race; where you were born, raised, and educated, etc.), what influence your parents might have had on your life, any current living relations you have, and what events - inside or outside the scope of the campaign - have affected your life.
Friends, allies, and patrons: Note any influential acquaintances your character has - in the past or currently.  This includes friends, contacts, mentors, henchmen, frequently patronized businessmen, etc.  Note that I'll allow a little bit of creativity here (but consult with me).  Anyone who wants to create and detail an NPC as in the Sages & Specialists (or in a similar manner) will receive an extra experience point bonus.
Enemies: This may include enemies you got points for when creating your character, or other, minor rivals that may not have warranted any CP bonus.  This may also include any enemies acquired during the campaign that have earned your special ire!
Short-term goals: What does your character want to accomplish in the immediate future?  What problems loom largest in their minds?  This, of course, requires frequent updating.
Long-term goals: What are the characters motivations?  What plans and ambitions does your character have for the distant future?  What will you do as these goals are achieved?  What will you do if they cannot be achieved?