It can be very distracting trying to read a article on my website when there is all sorts of rubbish around the edges in the sidebars. To combat this when looking at a webpage on iOS five Safari you will be able to turn on the reader. This will give you a very clean view of the text and pictures of the website that you want to read and look at.
If you see a website that you want to read later and rather have it lost in the bookmarks, you can put the instead into the reading list. When you look at the dialogue for the reading list on your iPad you will be up to see which ones you have read already in your list of websites to read.