Find directories which are group and world writeable

  find / -xdev \( -path /proc -o -path /opt \) -prune -o -type d -perm -777 -print

Find files which are group and world writeable

  find / -xdev \( -path /proc -o -path /opt \) -prune -o -type f -perm -777 -print

Find files and directories with sed user id bit

  find / -xdev \( -path /proc -o -path /opt \) -prune -o -perm -u+s -print