The local railway services of Mumbai is one of the cheapest and fastest means of commutation in the city. A place that may take up to two hours by road (especially during busy evening hours), will take hardly half an hour by the trains. At every station the trains will halt from 10 seconds to 30 seconds maximum. All you need to know is when your station comes, and which side of the train exactly is the platform (It is only on one side in most of the stations). While boarding a local train, make sure you have the bare minimum stuff only. All I had was my wallet, mobile and camera, stuffed inside my backpack. Carry your backpack, facing your front while you are inside the train.