LOL! Mostly I keep them straight because they are so different. One is a curtain fic where the boys own a western store, one is a sequel to a story I wrote about Jensen being the smartest man in the universe and Jared the empathy bonded to him, another is an SPN crossover with Criminal Minds, and another is a sequel to my remake of Dinosaur.

And thankfully the remakes of other movies are pretty different too. (Sky High = Sam/Dean where both boys are subjected to demon blood and Dean is the bad boy of the class, with Sam the newbie/goodie twoshoes of the group. Priest I can't decide to go J2 or Sam/Dean, but I'm leaning towards JDM or John as the bad guy :P and Inkheart is Jared as a Dad with a beautiful baby girl with green eyes and freckles and Jensen as a character from another time and place that Jared can't remember but trusts anyway).

See... all so different I can't confuse them :P though I do tend to work on one at a time. I just look at the list for the next deadline (which is currently my western store owners :P) and I work on it until it's done.