Learning Hanja

I have been casually learning hanja for the past two years and it's amazing how much easier it makes learning new words in Korean. 

example: 

I was with two friends who completed their military service and one of them mentioned the following word 

군행 

군 --> 軍 --> related to the army/military

행 --> 行 --> related to movement

so 군행 means " military exercise".

Making these sort of associations makes learning words almost effortless, fun even haha.

I highly recommend learning some hanja to native speakers of languages that historically have never used Chinese characters. 

Does anybody else have experience learning Chinese characters? How do you learn them?