For more than 10 years now, "click to donate" has been part of my morning while the caffeine kicks in and I like to think that over time that has added up to something of substance. The breast cancer donations go directly to the National Breast Cancer Foundation, not Susan G., and the 7 other worthy causes on the same site benefit from daily clicks, as well.
GoodSearch is a Yahoo-powered search engine that generates donations and allows you to choose which charity your donations go to. There are a whole slew of local and county Planned Parenthood organizations listed. The national organization, which sends money where it's most needed, is listed right at the top as "Planned Parenthood - Federation of America (New York)."
These are such little things and don't cost the individual anything, but multipled by millions of people participating, they can really make a difference. Both sites also have other ways to generate donations, from gift shops to shopping/dining.
Please consider using these easy, free methods to help support Planned Parenthood.