If you run across a directory listing of files that you'd like to download all at once, you can use a couple wget arguments to help you. Use -m to enable mirroring (equivalent to -r -N -l info --no-remove-listing) and --no-parent to prevent wget from recursing up directories. This command will download everything in the current directory and all directories below it.
As usual, run man wget for more information.
Tags: One Liners