Don't waste time doubting your own abilities.
There are times when we all must stand up for ourselves and be courageous. Fighting against injustice and unfair treatment is an act of bravery, and it's not always easy to raise your voice in protest. However, even a soft voice, a calm voice, a voice of reason, can cut through the negative noise and make itself heard. Find your voice and be courageous.
Before solving someone's problem for them, pause and allow them an opportunity to offer their own solution first. It's a great way to build their confidence and capacity.