Was working in a directory and to my surprise I got a disk full error. After a few moments I remembered Filelight. I very nice GUI app that lets you drill down to locate disk space hogs. However in this case I thought a command line tool might be faster/better. So went googling (used as a verb) and found a few good fast solutions. So far my my favorites are using the simple find command. Use M for megabytes or G for gigabytes.
Include file sizes (Fast!)
find . -size +1G -exec ls -sh1 {} +
Like above but sort by size
find . -size +500M -exec ls -sh1 {} + | sort -r -h