>>1267535literally just go for walks. get used to being out alone and in the dark. travel on trains and walk unlikely routes (particularly footpaths along highways, canals, and industrial areas). from the "train" side of things you get to see what's behind all the fences and all the civil infrastructure that's otherwise hidden, like dams, dumps, drains, sewers, dilapidated industry, etc.
Also read this and don't skip any - it's packed with shit that'll prevent you from dying so don't just skim.
http://sleepycity.net/approach-to-draining