I spent nearly three months working for Otra Cosa as a Marketing Coordinator. I helped in promoting the Otra Cosa's work among its community and in recruiting news supporters. In such a structure, you can be sure every initiative you take will bring the ship further. Everyone's dedication is the key to go forward. You really feel part of a something. And besides doing something I thought truly useful, it helped me improve my professional skills as community management or English and Spanish speaking.
I think volunteering for Otra Cosa is the best way to have a concrete and positive impact for people who need it and take a break from our european/western way of life...