With over year and half of data, my mac harddrive is choking. With backups for previous machines and trip photographs and applications etc. Although I've backup on external harddrive, my fingers still refuse to delete anything worthwhile from my mac. So until I bought another harddrive to backup my backup, I had to do some clean up. A quick googling helped me find this awesome software called Disk Sweeper that gives the directories in the descending order of size.