A big piece of getting serious about Drupal for me has been exploring relevant newsfeeds and figuring our which are worth subscribing to. Several months into it, I have it down to three favorites.

• Lullabot’s Drupal Podcast
  I love how Jeff Robbins and crew laugh their way through Drupal tips, analyses and news. Team Lullabot describes itself quite accurately as “Drupal experts.” While some of what they are talking about goes over my head, I can always return later, and meantime I’m learning what matters most to Drupal developers. This particular link is to Podcast #40, one of their best shows for those new to Drupal. In fact you might want to start with their shows ending in a zero, as #50 is also particularly helpful.
• Security Announcements
  While far from fun, if you’re serious about Drupal, it’s good to know what needs patching.
• Planet Drupal
  This aggregator has tons of great info, though I’d only recommend this for the enthusiast or Drupal-serious, due to sheer volume.