I essentially went through my entire collection to tag everything. Before I had the empeg, I would intentionally strip tags from every song I had because I had no use for them. When my empeg came, I spent the 18 months to carefully tag everything.

But frog, man, tagging everything by hand? That's so intense. I used the program Tag&Rename to query AllMusic and FreeDB in order to populate the tags on an entire album in a single click. But ensure consistency, I would reformat the tags by hand when (almost always) necessary. Heh, even no I find a few stray & signs and miscapitalized letters. But no underscores, those are evil.