I remember thinking years and years ago that what the world needs is a machine that you step into, and it zaps you with the thought that "You're an ok person".
Funnily enough, some of the problems of people I've met stem back to low self-esteem - NOT because they're arseholes (although occasionally you do meet one) but because no-one ever tells them they did good or helped, or made a difference.
Now I just think it's shitty that we need a machine when there's all these people cluttering up the earth who could take time out to say it occasionally.