You probably won’t get any help unless you are using a freely available theme and post it’s name here so we can look at the code.
I am basing this on the ‘Aperio Prototype Theme’, index.php. You can use any of the orderby parameters shown in the Codex article Query Posts/Orcerby Parameters.
For example to sort on title, change this:
<?php while ( have_posts() ) : the_post() ?>
to this:
<?php
global $query_string;
query_posts($query_string . 'orderby=title');
while ( have_posts() ) : the_post() ?>
OOPS – just realized I left out an ampersand. The code should be this:
<?php
global $query_string;
query_posts($query_string . '&orderby=title');
while ( have_posts() ) : the_post() ?>
