Hi Nitenurse - My family and I volunteer at a soup kitchen and a food pantry, which we got started in through our church. I also volunteer at a homeless shelter for teen moms - I babysit so the young moms can get their schooling finished. I got started in that through some volunteers that I met at the food pantry!
My suggestion is that you think of a cause that really speaks to your heart, and maybe that will answer your question about how to get started. If you want to help women, for example, look in the phone book for shelters, etc.
You can also check with local chapters of the Salvation Army, United Way, and/or churches. Or, as you said, google.
I have met some of the best people in my life through volunteering. I hope you will find something you are passionate about and share your talents with someone who needs them. I find that I get back much more than I give.
Jomey