The baking soda is optional, but if you choose not to use it, be sure to move the eggs to cold water (use ice) immediately after boiling. Blow from the tip to the broader base for faster de-shelling.

The irony, its that I happened to need this tip recently.  I lost alot of egg white and thats not acceptable, so next time I boil myself some eggs, I will definitely be taking Tim's Advice

(found via Tim Ferriss)