How to display the last posts or comments on the sidebar?

STEPS:

1. Enter the administrator page elements (Dashboard → Design or Dashboard → Layout in the new Blogger design).
2. Add a new feed widget, with the following URL’s:To show the recent posts:

   http://BLOGNAME.blogspot.com/feeds/posts/default

   To display the latest comments:

   http://BLOGNAME.blogspot.com/feeds/comments/default