What is the fastest possible way to download the blockchain? How to download the blockchain with full bandwidth?

How to download the blockchain fast?
To download the blockchain with maximal speed you want to be connected to nodes with high bandwidth. 

On default bitcoin will search and connect to random nodes. One can add nodes to bitcoin conf to tell bitcoin to connect to specific nodes.

To add a node to the bitcoin client to connect to, add the following to the bitcoin.conf file in:
Windows:/appdata/roaming/bitcoin/bitcoin.conf

Linux: $USER/.bitcoin/bitcoin.conf

ADD THIS TO BITCOIN.CONF

addnode=127.0.0.1


To find high bandwidth nodes go to: 


  blockchain.info/hub-nodes


for example and browse the hub nodes section.
It is not required to add the node port, bitcoind will find the correct port.

....
Enjoy downloading at full speed.

EDIT: since the question / answer gained such an attention i decided to make this a community wiki :)