A common thing for Drupal bloggers to do is to list the modules they are using on the their site. I love reading such lists. It's a simple thing to do, yet it's a huge contribution to the Drupal community. Drupal currently has thousands of modules available, some good and some not so much. It's tough for someone new to Drupal to decide which modules to use.

I once heard someone say that you should never let people know what modules you are using because it would help hackers find vulnerabilities. Whatever.