How can I change the "Post a Comment" text ?
Create a conditional new post link?
How can I create expandable post summaries?
How do I put my archive links in a menu ?
How can I list my archives by title?
If you are looking for these answers, Blogger has published a Hacks page which allow users to add or change (customise) their templates. These hacks can give you more control over your blog's appearance or setting.
Blogger Knowledge database
Blogging Your Novel (Part One)