Character biography. Now that you know who's who, here's a template for figuring out how they got to the situation in your novel. When it's time to write a flashback or refer to a past event, you'll breathe easier (and save yourself some edits) knowing you can look up the dates in this simple timeline.
Character master list. Got a lot of characters? This "quick and dirty" list helps you remember who's who at a glance. Add names, ages, and comments. Drop in a photo or drawing of each character to help you visualize your story.