rereading book part 2

Use of Model::set

$this->Post->read(null, 1);
$this->Post->set(array(
 'title' => 'New title',
 'published' => false
));
$this->Post->save();

 Model::save - alternative

save(array $data = null, array $params = array())

$params = array(
 'validate' => true,
 'fieldList' => array(),
 'callbacks' => true //other possible values are false, 'before', 'after'
)

http://book.cakephp.org/view/1031/Saving-Your-Data#counterCache-Cache-your-count-1033

 deleteAll(mixed $conditions, $cascade = true, $callbacks = false)

unbindModel only affects the very next find function. An additional find call will use the configured association information.

 $this->element('helpbox',
    array(
        "cache" => array('time'=> "+7 days",'key'=>'unique value')
    )
);

$this->cakeError(string $errorType [, array $parameters]);

debug($var, $showHTML = false, $showFrom = true):

Output from this function is only shown if the core debug variable has been set to a value greater than 0.
 

Session component 

cache

Use the caching engine configured by Cache::config(). Very useful in conjunction with Memcache (in setups with multiple application servers) to store both cached data and sessions.