How do I sustainably remember terms in history, folk dances, GI tags, endangered animals and such other stuff?

Revision is the only way out of this. I never bothered with the GI tag thing. It was a hit and miss. Folk dances and similar cultural items, I had made a list and stuck to that list exclusively. If anything outside of that came, I left it.

Endangered Animals I made a huge list and studied them religiously. It was classified into mammals, birds, reptiles and each of these had short notes on their pecularities. I revised the list at least once every week, the last month before the prelims.

Here is what it looked like.

I suggest you find your own way for this.