My favourite* bit of working on a finished MS is searching on XXX to find the bits where I didn't slow down to do some nitpicky or difficult research, the bits where I bodged the timeline, and the bits that go XXX BIG EMOTIONAL MOMENT HERE, REWRITE.

*this is a lie

/search for XXX
/find XXX in MS, think "oh jeez this will take ages, I'll do the low hanging fruit first, search for the next one"
/search for XXX
/repeat 4 times round the complete MS
/go on Twitter

Okay. I have ascertained which real police station would be covering the area of my fictional nightclub in 1924. I trust you all appreciate how incredibly much the correct station name will enhance your reading experience.

/glares resentfully at fantasy authors/

ooh get them with their TOTALLY MADE UP MAPS and SELF-GENERATED HISTORY THEY CAN'T GET CALLED ON.