NESTA from UK has created useful Toolkit on Social Innovation that can be of help to every aspiring social entrepreneur (the link is below).

How can we create more economic, social and environmental value in our communities? Over the last few years, the European Social Innovation Competition has mobilised thousands of Europeans to tackle that question. Whether the issue is how to make digitalisation inclusive, providing refugees with opportunities to take part in society or using place-based approaches for empowering
young people in a changing economy: social innovation is about coming up with new responses to such societal needs and problems. This toolkit aims to support social innovators all across Europe to develop their ideas, by using the steps of the innovation spiral. Each step is presented with a set of tools and sources that you can use to transform your idea into a viable and effective initiative.
Social innovation is not a new phenomenon, but it has grown in prominence over the last decade both as a term and as an important driver of social change. There is no universal definition of ‘social innovation’, but one that is both elegantly simple and widely-used is
‘ideas that are social in their ends and in their means’ (see Nesta 2010). Ideas may vary to be products, services, processes or organisational models. Social innovation concerns the process of developing and deploying new effective solutions to challenging and often
systemic social and environmental issues.
The European Social Innovation Competition seeks social innovation ideas that are social in both their ends and their means. Each year, the European Social Innovation Competition raises awareness of a different challenge facing European society and aims to unearth
potentially game-changing ideas from all corners of Europe. The competition was established in memory of Diogo Vasconcelos, a visionary Portuguese leader who focused on fostering innovation to address some of the great societal challenges of our time. This competition will continue his legacy by inspiring more and more Europeans to become social innovators, making improvements to their communities and societies.

Here is the link.