Thanks, this sounds like good advice -- I've been concentrating a lot on what external actions I should take, and not on what actions I can take to change myself, but those are at least as important.

I've shunned clichéd things like volunteering at a soup kitchen since they seem to me to be quite low impact activities compared to things such as the SIAI, but they might have a larger impact on my self identity than donations to charities, which I've neglected to consider.