1. Resources on Help & Training
2. YouTube Channels
3. Lightning Experience Launch 2015
Lightning Experience Launch Video
Request Pre-Release Access to Lightning Experience
Lightning Experience Trailhead
Search for Lightning Experience in Dreamforce Sessions
4. Lightning Experience: Trailheads by Roles
Lightning Experience for Sales Reps
Lightning Experience for Admins
Lightning Experience for Developers
5. Lightning Components & App Builder
Lightning Components Trailhead for Developers
Lightning Components Developer Guide
Lightning Components on AppExchange
Lightning App Builder Trailhead
6. Lightning Tutorials
Lightning Components Sample App: Belgian Beer Explorer
Creating a Simple Real Estate App with Lightning Components