To complain about an issue without making an effort to fix it is near hypocrisy.
If you see an injustice, fight it. An attitude of "one person can't make much difference" or "it doesn't affect me, so I won't bother" only serves to make things worse.
Every little bit helps. Even if you don't have the means to go out and actively work to change the world, raising awareness and attempting to inspire others is just as important.
The "little problems" may not be so little. If it is a negative thing, it should be fought - no matter how insignificant it seems on the surface.
You can never know just how bad something is until you choose to involve yourself in fighting it and see for yourself the extent of the damage.
Never be content with what others teach you, but always be willing to question your beliefs and search for your own answers.
Making light of discrimination is almost as bad as discriminating yourself.
Apathy is the thing that is slowly killing us.