How Do You Know will be released on DVD and blu-ray in the US on March 22nd. You can pre-order your preferred choice of DVD or Blu-ray on Amazon.com. No details on extras or artwork yet.

EDITED the next day: Flix66.com list the extras as follows:

* Interactive script gallery
* Commentary with filmmakers
* Select scenes commentary with James L. Brooks and Owen Wilson
* Deleted scenes commentary by James L. Brooks
* Optional commentary with James L. Brooks
* “The George”
* Blooper reel
* Extra Innings
* A conversation with James L. Brooks and Hans Zimmer