Getting on and off Mumbai Locals

Keep Left is the best advice. Don't ever board a moving train (I mean it I tried and if it wasn't for some good samaratins I would have been past). If you are boarding into a train at Kurla or Dadar, then stand in the line meant for the station , I don't mean there are queues on the platform but inside the train, passengers stand in separate queue to alight at their respective stations. So again ask before you choose your queue because the standing in the wrong one would mean missing your station. The train stops for 30 seconds in each station which gives you sufficient time to get in and get out as well, so try not to push or pull it is not only indecent but also creates a lot of confusion, the crowd will anyway see that you get pushed out, sometimes you reach half way up the sky walk without any effort from your side.

So don't worry, board the locals to save time and energy, the only place you would be wasting time is when you wait for your connecting train, but anyway this is the fastest way to travel in Mumbai.