Articles are being written about how the Google +1 button is already helping to boost websites into the top Google search results. I added the Google +1 button early on and immediately noticed it helping.
Since Google is not indexing Facebook and Twitter, it should be patently obvious that you should be using the Google +1 button on your website. If you have useful, interesting or entertaining content, people will click the Google +1 button.
A word of caution, there are many services that will offer to do this for you. Don’t even think about it. It is an extremely simple matter for Google to figure out that it’s not occurring naturally. If you use a service to manipulate Google +1, Google will eventually figure it out and I’m not sure if the damage can be undone.