Before I had my son, I gave back as much as I could. :) I used to donate about $800-1,000 a year to Kapiolani Medical Center, which specializes in kids (ironically, my son had to spend lots of time in a similar center in my new town, which makes my previous donations mean even more to me.)
Other than straight monetary donations, I try to be as "green" as I can- recyling bags, minimizing extraneous consumption, only drive when necessary, etc. I also freecycle to keep things out of dumpsters and landfills, and I try to buy things used if I can for the same reason.
Both my cats (and all of our future animals) are from the Humane Society. I also donate tons upon tons of items to Goodwill yearly. When I was more fit, I used to do charity walks and races. I volunteered for beach clean ups, theatre work, and Ronald McDonald house.
Does this make me a better person? Not necessarily. It doesn't make me any better than anyone else. I do feel better about myself though, which makes me continue to do it. I think giving and donating time/money is a personal choice, and not everyone has the same outlook on it.
I think the purchase of purses is also a personal choice. I love bags, and if I had the money, I'd definitely own a lot more of them regardless of cost. Just because you feel a little uncomfortable spending that amount of money on a purse doesn't mean that the women willing to buy them are wrong in any way.
Also, you need to keep in mind that the impact of a high-end purse differs according to income, age, and lifestyle. When I was a student I would never have purchased a bag over $200- I would have felt guilty for weeks. But now, only a $2,000+ purse would probably make me feel like that. Give me ten years and I'll probably be able to comfortably buy whatever purse I want without feeling the way you feel about buying purses.
Oh yeah- a shout out to my favorite charity-
Children's Miracle Network
I use their hotline all the time, and the services they offer really helped my family during our time of need.