Many customers in the process of rolling out SharePoint across the organization have recurring questions about the best sources for training and tools.  Below is a compiled list of some of the available resources (kudos to Gabor & his credits for the list):

Training and Adoption:

Compliance, Governance and Administration:

Utilities and Add-ons:

Legacy Migration and Integration:

Technical White papers:

Books:

The following books are worth reading – some are more reference-like, others are more on the tutorial side: