We need to be proactive to prevent depression. Cognitive Behaviour Therapy is used to combat it and it can be taught. Positive Psychology sounds better - here is a lecture about it.
3. Investing and Personal Finance
Most people don't know that investment advisors don't usually beat the market. You can easily waste a lot of your savings. And if you don't have savings you need to know how to budget. In Israel we have a few non profits that work on this: