Start blogging about the charitable organizations around you and worldwide. Provide information, insights and association options/details on various charitable organizations. Who are the audience? There are people like you looking to donate to causes via genuine charities. There are people eager to volunteer. And there is a lot of interest in streamlining charities bringing transparency and accountability to the nonprofit sector. Your blog can be an invaluable source for them.
You can run evergreen topics around charity reviews, fundraising approaches, or inspiring stories from successful charities. As your blogs becomes popular, there may be a rush of organizations to get associated with you and become popular via your blog. So, opportunities are huge and this one is a unique idea to start with.
Blog Name Idea: CharitiesRated.com