I love this Community Management Playbook from Yammer. Tons of good advice in here.
“Online communities have taken hold among businesses, to connect employees, customers and partners. However, community management as a profession is largely misunderstood and inadequately resourced. We created this book to raise the literacy level among businesses on what community managers actually do, and for community managers to have a trusted guide in their daily jobs. This guide addresses at a high level the strategy, design and everyday execution of a successful and healthy community.”