Display Custom Fields in Post after Save

All,
I’m using the add_action(‘save_post’, ‘myplugin_save_postdata’) in my Post. I’ve got some custom fields that I’ve added using the add_meta_boxes action. I can save the fields and it works ok, however, when it displays the Post it doesn’t bring in my custom values back into their fields. How would I go about showing the values of my custom fields after I saved my Post?

Thanks in advance!