Most people who use the Mumbai locals frequently don’t rely on daily tickets and have monthly passes (also known as season tickets). You can either book monthly passes, quarterly passes or yearly passes, though most commuters prefer quarterly passes, which means you need to queue up for your monthly pass atleast once in 3 months.
IRCTC now allows commuters to book their season tickets online and pay for them either via Netbanking or via your credit card, and the ticket will be couriered to you at your doorstep (with a nominal fee charged).
Click here to view a quick guide how you can book your season ticket online