I've set up monthly donations to:
ACLU
Planned Parenthood
Save the Children (El Salvador)
NAACP Legal Defense Fund
MALDEF
Sierra Club
ProPublica
Another environmental group whose name escapes me right now
Democracy Now!
Another women's health group (international)
I set up my Amazon smile account to give to a local charity, and every time I forget to purchase on Smile, I have to give 5% of the purchase price to that charity. I actually *just* did that, and 5% seems small for a penalty... I may up it to 10%.
I also just upped all my auto-savings from my paycheck to my 403(b). I'm not great at determining how that tax-deferred money will affect my take home pay, so I tried overestimating (I hope!). If I successfully did so, I'll be able to add Doctors Without Borders and The Southern Poverty Law Center to my monthly contributions. I'd also like to add the local youth shelter, the local women's shelter, and a refugee fund to my donations, but those may have to wait until my raise in October. I changed too much this month to be entirely sure what my net income is going to be.
I've made some rules for my pared down budget that all involve gifts to charity as "penalties." For example, I want to limit my eating out to twice/month. If I go a third time, then I have to donate the entire check amount to one of my charities or nonprofits. That should mess with my budget enough to discourage frivolous spending, but when I decide the splurge is worth it for me, then the splurge will benefit someone else as well. I think that will be a good reminder that I'm choosing to save in a world where many people don't have that choice, and even more than it is my responsibility to save for the future, it is my responsibility to help my neighbor.