Sometimes service means doing an unglamorous task before anyone asks.

The tasks nobody claims are the ones that reveal what a person is like. Stacking the chairs, doing the washing up, sending the follow-up nobody wanted to send. It attracts no praise, it is genuinely needed, and doing it without being asked changes the atmosphere of a group more than any speech.

Look for the thing everyone is stepping around and do it once, without mentioning it. This is a small habit and it compounds into something people notice about you without ever being able to cite an example.