For Display post title inside the loop you can use following
For Post title <?php the_title(); ?>
For Post Short Content <?php the_excerpt(); ?>
For Post Category <?php twentyten_posted_in(); ?>

Or Display post title out side the loop 
use global variable $post <?php global $post; ?>
For Post title <?php $post->post_title; ?>
For Post Short Content <?php $post->post_excerpt; ?>