There is a helpful article on ReadWriteWeb about how to clean up the apps that have access to your social networks. The more apps you let contact these accounts for log in info the more ways in to your accounts hackers have.
So don’t wait until your Twitter account is hacked. Take some time right now to clean things up and eliminate the apps that you no longer use or find relevant to your social networking way of life.
To make it easy, here are links to the three places that will allow you to peruse your apps and alter what services they can access:
Learn everything you need to secure your accounts via ReadWriteWeb.