To control who sees your posts in the News Feed and ticker, be sure you use the privacy control in the Update Status box. Also remember that the comment privacy is tied to the privacy of the post: If you comment on someone's public post, your comment is thereby also public.

If you play games like FarmVille or use apps, Facebook publishes your activity to the News Feed and ticker. To control what apps or games information shows up in the ticker, you need to visit the privacy preferences in your . Here, you can set the individual settings for each application by clicking "Edit" next to the application's name.