How does an individual who wants to make a difference sift through the myriad NGOs, charitable organisations and investment funds all claiming that they are transforming lives and expectations in the developing world? How can one be sure that a donation will be well spent and how does one measure the results? In short, how best to give?In the second of their unmissable series, Tomorrow's Horizons, Intelligence Squared and Deutsche Asset & Wealth Management showcased some of the brightest and best ideas about how to give at the Corinthia Hotel in London.