This document provides 10 tips for non-governmental organizations (NGOs) on using Twitter effectively. It advises NGOs to monitor discussions on relevant issues, identify and follow influential users in their sector, add a bio and link to customize their Twitter profile, engage with their audience by responding to comments and questions, and use hashtags to make their tweets discoverable on topics. The tips also include using apps to easily post tweets, not just repeating the same information, and checking their Twitter profile periodically to assess and improve their content. The overall message is that NGOs can raise awareness of their causes and engage supporters through Twitter by following these best practices.