A simple but powerful act for social justice is to write a letter expressing your views and send it to people in power who are in a position to act – a legislator, a government leader, an executive of a business or government agency... Even a letter to the editor.
The Social Justice Council regularly organizes letter writing campaigns. People in positions of power are more impressed when they receive a real letter signed by a real person - and more likely to act. Hand-written notes are even more powerful.