How do you sort your LPs?

Alpha by artist.  If you want to catalog them, consider putting them into the Discogs database.  You can then download a CSV file from Discogs.

Uber, I'm still working on mine.  I think I have close to half my records in now.  Every time I listen to a record, I check to see if I have it in my collection, and if not, I enter it.

I think downloading the CSV is a good idea just in case...