Learn how to export your photos from Lightroom using the Export dialogue.
Learn how to create dodge and burn layers in Photoshop to add highlights and shadows non-destructively.
Learn how to use stacks to organize your photos in the Library module. The auto-stack feature is a great way to consolidate bracketed photos.
In Part 3 of this series, A.J. breaks down the detailed technique for creating several luminosity selections and saving them as channels in Photoshop.
Part 2 in the series on working with Luminosity selections & masks in Photoshop.