Live by these words

Except when you’re surrounded by people who are giving 80% and you are seen as lazy and a slacker so you get fired to make room for someone who will do your job better.

Make yourself indespensible.
Also, don't read twitter. That's not job advice, just good advice.

Or when you give 100% but they think you give 75%

This assumes your employer doesn't hold you to any particular standard.