Photoshop for video
OK, this resource is not about Premiere Pro per se: it's about Photoshop. But Photoshop is a great tool for Premiere Pro users, and I would hazard that many, if not most, Premiere Pro users do use Photoshop as well. Thus runs my justification for telling you about Creative COW leader, Richard Harrington's Photohop for Video blog
For example, who doesn't need to make lower thirds occasionally? If you want to learn how to make them with Photoshop, you already have one good reason to visit Photohop for Video. See Making Lower Thirds Part 1 - Photoshop for Video