How do you organize your LPs?

Sort by artist name. Separate out any classical and multiple artist compilations. Classicals can be sorting by composer, performer, period etc.

Whatever works for you is good, but a sign of a rational filing system is whether a third party can find a record and/or put away a record without opening the field manual.

I once saw a film documentary about youth car culture. Young guys, and they were all guys, spending much money on their cars and hanging out in parking lots with the hoods open so you could see and appreciate the custom engine work. One guy was asked "Why?" and his response was interesting. He said, "if your car's together, then your life's together". I guess the same thing could be said about audiophiles and their record collections.