http://www.lynda.com/Lightroom-training-tutorials/450-0.html
Watch the first 3 videos I linked, play with Lightroom, and then come back and watch again. You'll learn more now that you're familiar with the tool.
[1] https://www.youtube.com/playlist?list=PLllFqBuTM0WI0fC_PujkG...
I watched the first three videos and it actually turned me off to lightroom a bit or at least the workflow that was demonstrated. For example, when the author used the clone stamp tool it was painful to me that he just left those duplicated clouds in the final image without attempting to merge them in more gracefully. The final post-processed images look really amateur to me - overly artificial but not in a tasteful way. But all the youtube comments seem to be very positive so take my comments with a grain of salt.
I always assumed lightroom was used primarily to correct mistakes made by the photographer in exposure settings but it's use here seemed more artistic in nature... more like a fancier version of Adobe Elements. For example, one of the final steps in the author's workflow is to select a Camera Calibration which essentially applies some filter to the entire image like "Vivid" - which I thought negated all the effort to manually adjust all the individual colors, contrast, saturation, etc.
Anything you can achieve in lightroom you can achieve in photoshop. So why lightroom?
Firstly, it's optimised for the type of things you want to do to photographs (compared to the scope of what's possible in all of digital image manipulation i.e. photoshop). Editing functionality, UI and additional tooling/features are all focussed (pun not intended) on this, so it's a much more pleasant experience when working with hundreds (or even tens!) of photos
Secondly, lightroom is as much about editing photos as it is about managing collections photos. You might want to tag photos, rate them, search for "photos taken in this date range, with this lens, rated above 4 stars". You will have a hard time doing this by other means.
Don't dismiss it because you know photoshop, or because you don't like that guy's style. Shoot RAW, give lightroom a go, you'll be surprised how much you can recover photos which would otherwise go in the trash if shot as JPEG. Lightroom also has lens profiles built-in, so it knows how to correct vignetting, distortion etc for each lens
Try shooting RAW + JPEG and see the differences between the pics.
Personally, I believe that doing the post-processing myself is part of the experience of photography, and I find it fun to tune each photo according to my tastes. But I do understand that's not for everyone.
