How do you make a difference?

I use SocialVibe.com
It's free.All you have to do is choose a cause to support then choose a sponsor and put a badge on your sites.And every time someone views your profile you get one point and every friend you invite,you get 100 points.Those points get converted to charity money for the charity of your choice.You can also earn some perks:)
My cause is for Peace and Human Rights.Check out my profile to see what the badge looks like

I do not have much money myself.What I do is I like to crochet,so I buy inexpensive yarn,or sometimes get it for free and I crochet quilts and donate them to homeless shelters,and children's homes.I know it isn't much but every little bit helps.I also have my friends save all their children's clothes for me as they grow out of them and I bring them to a children's home to help cloth these kids.I also sometimes volunteer at the home and do crafts or something with the kids.I find it very rewarding,the kids look forward to me coming and I think I get more out of it hen they do.
I am hoping to someday be in a position to get my foster parents license so I could take in one or two foster kids.
i will check out the web sites you mentioned maybe I can do more there as well.
Jas