You probably want to use get_permalink and get_the_title. Example:
<a href="https://wordpress.stackexchange.com/questions/19555/<?php echo get_permalink( YOUR POST ID ); ?>"><?php echo get_the_title( YOUR POST ID ); ?></a>
Replace YOUR POST ID with the ID of the post you’d like to link to. Post ID’s will change from install to install, however, so this might not work as expected.
http://codex.wordpress.org/Function_Reference/get_the_title
http://codex.wordpress.org/Function_Reference/get_permalink