1. Ethical Banking? - Why not try move your money from banks that rule the world and make risky investments to banks that invest in social causes, charities and social businesses?
Here is one option: Charity Bank.
2. Live a more environmentally friendly lifestyle!
3. Alternative ways of consuming? Here is a very small Wikihoıw list of where to begin.
4. Join local parties / initiatives or communities that promote positive social change!
5. Freecycle / Upcycle / Share tools and resources.
That's it for now. =)