[profsummergig]

Speak less.

For practice: for a year, don't say a word.

[StevigeHoning]

Become the weird guy that never says a word.

[pjerem]

wait, what ?

[Propelloni]

It's one of the old "how to win friends and influence people" [1] moves. Say as little as possible. It seems people tend to overestimate the smartness of quiet persons, so their contributions will be respected more.

[1]https://en.wikipedia.org/wiki/How_to_Win_Friends_and_Influen...

EDIT: added link