I was reading through a link on an Overcoming Bias post about the AK Model and came across the idea that, " the Social return on many types of investments far exceed their private return". To rephrase this: there are investments you can make such as getting a college education which benefit others more than they benefit you. These seem like they could be some good skills to focus on which might be often ignored. Obvious examples I can think of would be the Heimlich maneuver, CPR, and various social skills.

Do you know of any good low hanging fruit in terms of skills or time investments a person can make which can provide a lot of benefit to the people around them (company, family, friends, etc.) but don't actually benefit themselves?