Drupal has literally hundreds of plugins (modules and themes) to choose from. After having set up quite some Drupal environments I start to find a couple Drupal administration modules particularly useful. Most are lightweight, and all are quite useful:
After a way too long hiatus (which was mainly due to a remodeling job that took longer and became more extensive than anticipated) I finally took the time to update the website engine (Drupal and assorted extra modules) to the most recent version. This should make it less vulnerable to external threats. Fortunately most spammers are already caught by Mollom, although I had to handle 2 uncaught spam comments in the past week.