This is very informative Neuro. My mp3 collection is a bit of a disaster as I have files saved in numerous formats on numerous hard-drives. This is a job I have been meaning to do for ages to sort out mp3 collection.
I will take this advice onboard.
Bitrate (always strive for 320k but I will do with 192k as a minimum)
Filename (which will always be in the format: Artist - Title (Remixer))
Copyright (label name goes here, ideally original release, else first UK label)
Length
Year (when first released)
Size (this is just the filesize,
Comments (Cat# goes here)
Album (I rarely use this but sometimes its necessary)
Cheers..