I just thought of something OP that might help you: Character Sheets!
I've been in the habit of writing my character's info on actual paper for about 4 years, and I keep all these pages in a journal. I started this habit while playing Oblivion, actually. Here's an example:
Name: Lord Haaf-Mersey
Creation Date: October 28, 2012, 6:22 pm
Age: 28
Class: Crusader
Alignment: Lawful Good
Factions/Titles: Dawnguard / Thane of Falkreath
Skills: Sword, Shield, Running, Literacy, Warrior, Blunt Weapons, Horsemanship, Speechcraft
Spells: Heal Self, Heal Other, Light, Shield, Turn Undead, Calm, Silent Movement (Muffle), Detect Life, Detect Dead, Clairvoyance....
... as you can see, I kinda mix some old-fashioned RPG stuff into my character sheets. Anyways, after spending some time writing stuff down, I think it helps get a clue (at least) of what your character's about. It's also fun to geek out once in a while!