When building a plugin that has its own settings page, it’s often handy to create a link to the settings page straight from the Plugins list – this saves users the time it takes to find where exactly your plugin appears in the admin menu. Here is a simple code snippet that creates the settings link for you – all you need to do is tell it where to go:

function plugin_add_settings_link( $links ) {
    $settings_link = '<a href="options-general.php?page=plugin_name">Settings</a>';
  	array_push( $links, $settings_link );
  	return $links;
}
$plugin = plugin_basename( __FILE__ );
add_filter( "plugin_action_links_$plugin", 'plugin_add_settings_link' );

Simply replace the href attribute with the link to the plugin settings page and rename the function to something slightly more unique (preferably all wrapped in an if(!function_exists()) conditional).