Adobe Lightroom is an excellent piece of software for a photographer like me. I have watched training videos of Chris Orwig from lynda.com and since then have added Lightroom to my post processing workflow.
A beautiful workflow which eases out the processing and reduces time increasing the efficiency. I will show you an example below which I have submitted for the HP Nature challenge contest.
It is an image from the ruined south Indian city of Dhanushkoti which got washed away in the floods in 1960. The light was uneven due to cloudy weather near the sun and the exposure setting were playing tricks with me.

I managed to capture the image but the essence and colors did not come standing out. I thought of processing it recently using Lightroom 2.5 and below is the result after processing which took me maximum 30 minutes.

Feel free to send me comments to improve the processing.