du -sch * | sort -h

or

du -Sh | sort -rh | head -n 15

or

du -s * | sort -n | cut -f2 | xargs -d "\n" du -sh

The result will be something like this:

15G ./home/aa/backup/2015-07-11/accounts
9.9G ./var/log
9.9G ./usr/share/locale/zun/LC_MESSAGES
823M ./usr/local/cpanel/bin
584M ./usr/local/cpanel/whostmgr/bin
536M ./usr/local/cpanel/bin/admin/Cpanel
240M ./var/log/sa
227M ./usr/local/cpanel
219M ./usr/bin
195M ./home/aa/backup/2015-07-11/system/dirs
180M ./usr/lib64
175M ./home/aa
124M ./usr/local/cpanel/cgi-sys
95M ./usr/lib/locale
89M ./usr/local/bin