I'll echo this sentiment and add that during my career I've experienced a number of ups and downs. During the downs, when it felt like I've wasted years of my life for something that went nowhere, what always felt worthwhile to me was the time I spent doing charity work and volunteering. You don't need to be a Feeney to make a huge difference. Many of the people on HN are insanely well educated and knowledgable and have skills and traits that can be put to good use helping others or inspiring a new generation, especially among the less privileged. Just spending an hour or two a week over a period of years can yield tremendous results in the lives of others.