Things have a nasty 'habit of not turning out' the way you expect them to. [=things often do not turn out the way you expect them to]
He reached into his pocket for his keys 'by/from force of habit'. [=he did it without thinking because it is what he usually does]
I'm 'not in the habit of' making predictions, but I don't think there's much doubt about who will win this election.
(..) I work on at the agency. "The breakfast with the built-in bounce." - I wrote that line. - Very catchy. - Say, do you mind? - I'm sorry. I have this habit of doodling. - It keeps me thinking clearly. - We have work to do. There's no point staying here for ever. OK. (..)1957 12 Angry Men