I use my google account for saving YouTube videos. But Google has added a whole bunch of their services onto my account, such as Adwords, documents, calendar, Picasa, talk, checkout, sites, blogger and more. Now I would like to be able to de-select (delete) all those services that I don't want and don't need, is that possible? For example how can I delete the blogger account?
Unfortunately, the only service that can be permanently deleted from a Google Account is Gmail. This can be seen under your Account page by clicking Services -> Edit. The only option under "Delete a Product" is "Remove Gmail Permanently".
That said, you do not necessarily have to use any of the indicated services. They are merely there should you wish.