Whatever is possible to mark on a map, I do it (Ex - GI Tags, UNESCO Heritage, Congress Sessions, region wise Bhakti saints, etc), and add relevant information there itself in brief.
I realised I remember things I've heard/seen better than things I've read. So, in addition to newspaper reading, listening to TV debates/podcasts on important topics helps. And good youtube videos for recent geographical/environmental phenomena instead of reading newspaper articles on the same.
Asking friends to quiz me (Ex - Constitution Articles, Wetlands).
And the rest is all old school stuff - re-reading, revising, short notes, etc.
