Sidestep a Muni ticket
Unlike the SFPD, Muni cops aren’t allowed to follow you, detain you, or compel you to give them your ID. No ID; no ticket. One big caveat is that if there is a police office on site at a random fare check, they can make you show ID.
Get your dollar bills in the fare slot on the first try
First, you don't have to put each bill in separately. They can all go in at the same time! Second, if your bill is really worn, fold it in half the long way to make it easier for the fare box to catch it.
Your pet can ride Muni even if he's not a service animal
Yup, Fido can ride the bus with you, but not during peak hours (Monday-Friday, 5-9am and 3-7pm). He's also got to be leashed and muzzled and he needs to pay a fare equal to your own.