Lately, I've been spending a lot of time considering what things I can do to make me a better person, specifically in terms of what my net "existence footprint" is, in kind of a overblown, wholistically hand-wavish way. Some of these things have become cliche - carbon footprint, energy footprint, waste footprint - and some are just the net-effect of being on the planet for a little while, both positive and negative. I think that if you're a thoughtful, observant person, these things are hard to ignore. But it turns out that no matter what you do, you can...