The Obama campaign's digital operations proved to be a crucial point of success that led to the re-election of President Barack Obama in November.

Based on a sophisticated effort and larger emphasis on digital and new media, the Obama campaign engaged supporters and raised an unprecedented amount of money through its digital efforts.

How did the Obama campaign become so effective in the digital realm? Engage, an interactive digital political agency in Washington, D.C., recently published a report entitled "Inside the Cave." It features a 93-page, step-by-step in-depth look at the secrets to the Obama digital team's success.

We've collected 15 of the report's key topics and published them here.

(Note: A special thanks to Engage president Patrick Ruffini for permission to republish parts of the report.)