Thinking ahead is key when it comes to utilizing Drupal to its full potential. Even though there are a lot of modules that can be helpful, they can also be dangerous. Before you install any module, make sure you know what it does and what its limitations are. To stay up-to-date, keep an eye on core updates and contributed modules. You may also want to consider using Alternative PHP Cache (APC) to boost performance, as well as Memcache to reveal issues in cache memory tables. Lastly, Varnish can be used to reverse proxy cache and reduce server load when your site gets visited by anonymous users often.