If you don't know about Effective Altruism yet: It is a philosophy and social movement that aims to apply evidence and reason to determine the most effective ways to benefit others. (William McAskill) If this was too short, you can find more information here.
Some Friends and I have built a local community of people who want to do the most good with their resources (time and money). We organise events almost weekly, definitely check our facebook page and our website if you are interested...