Have you found your charitable donations changing as you adopt a mustachian approach? Did you downsize everywhere include charitable deducations, as it's an easy way to save money? Or did you increase your donations as your income frees up?
We've always been relatively careful and spend well under our income, but I've recently been trying to prune it further and came across this site in the process. (We have a good income so staying within it is never hard.) At the same time, I've recently been working hard on a project, an auction fundraiser for the non-profit where I'm President. Although I'm trying to reduce my eating out budget (ah, lunches, and persuading DH to reign in beers/dinners out or explain that no, fast food isn't cheaper) in particular, I have no intention of cutting back on my charitable donations. In part, it's because as President I'm expected to make a reasonably sized donation. In part, it's because I avoid spending friviously to let me spend where I want to spend.
What I *did* do differently, though, was to decide that this year, I would deliberately seek out items for the auction that I would normally buy as presents for family members, or use in my daily life. (In the past I've not taken the lead on the auction, but I'm trying to step it up this year by 25%.) I'm still brainstorming ideas for popular items, but I'm also targeting certains areas. For example - DH enjoys coffee. I've got a coffee company to donate some bags of coffee. (true win win, this means he's not buying it from Dunkin' Donuts). I've sought out crafting companies for my mom/sister, I'm looking for golf fee donations to bid on for my DH/brother-in-law, etc. So now I can support the auction twice - first by procuring items, and second by bidding on those items, without really any increase in my charitable donations budget. As long as I stay within budget, that is!
When I'm FI I anticipate being able to devote more time to charity as well.