Have you ever had an image that was pretty good, did your processing on it and then left it for months? Have you come back to that photograph and tried new processing techniques out on it? That's one of the things I love about Lightroom. I can create a snapshot of an image and start my processing over again from scratch and compare the two images to decide which I like more. And revisiting your shots is always a lot of fun.
Take this image I shot this summer in Banff National Park. When I first looked at after getting home there were a few problem areas. I was shooting into the sun somewhat and it was hard to keep the highlights from blowing out. I did try bracketing and then using Photomatix to create an HDR image but I didn't really care for the results.
Tonight I tried good old fashioned dodging and burning. I've also download a bunch of camera profiles for Lightroom and the Camera Landscape profile really punches up the colors.