# To download a single file
wget http://path.to.the/file

# To download a file and change its name
wget http://path.to.the/file -o newname

# To continue an aborted downloaded
wget -c http://path.to.the/file

# To download multiples files with multiple URLs
wget URL1 URL2

# To parse a file that contains a list of URLs to fetch each one 
wget -i url_list.txt

# To download files according to a pattern 
wget http://www.myserver.com/files-{1..15}.tar.bz2

# To download all the files in a directory with a specific extension if directory indexing is enabled
wget -r -l1 -A.extension http://myserver.com/directory