As I started with Drupal I have slowly worked to piece together the pieces of Drupal that are required for a fully functional website with distributed contenet management, personalisation. This has taken some time.
On the administrative side of things I have found Plugin Manager very useful to install and maintain the status of plugins and the Backup and Restore module not only to backup but also to easily create copies of the Drupal file and database set to quickly create Drupal images. I've also started to look at Themes to update the visual design of Drupal sites.
I've run into a few issues and its certainly been a learning experience. I've figured out how to recover from the 'white screen of death' by enabling errors and then disabling the modules causing the issue manually via the database and then reseting the cache.