How do you organise your sidebar? – Book Blogger Hop

Hi everyone!
I would like to join more blog hops so I decided to start from the Book Blogger Hop that is a weekly meme hosted by Ramblings of a Coffee Addict Writer, where you answer a question and join the “hop”.

The question

How do you organize your blog in terms of what is in your side bar? Do you have categories and defined sections in your side bar? more “How do you organise your sidebar? – Book Blogger Hop”