On The Bakery (the CakePHP resource) there's a recent post looking at a simple way you can integrate database query caching (using memcache) into your CakePHP application's models.
Most common way to access data is a database. Most common way to speed this up - Memcached. As a quite young CakePHP developer I had a bit of headache "how to cache queries effectively?". Now I know the way, so I share.