A nice roundup about why you should avoid using a burger button for your mobile navigation. Read the full article here: The Hamburger Menu Doesn’t Work – Deep Design.
A nice read about how to make your checkout experience better with css transitions and animations: https://medium.com/p/3d1b0a9b810e
The pursuit of delight is in the details
A nice selection of 15 iPad friendly ecommerce sites
A lean approach to user centric design