How to save time to your users and to not lose them
If you are designing a checkout ALWAYS remember: one user out of four leaves the checkout process because of the high number of forms to fill. This article would help you giving 9tips on how to optimize your checkout forms and not loose users.
Detect “City” from “ZIP Code”
Use Google Geolocation API
Get all the information from the Postal Code (UK)
Suggest the most used E-Mail domains on your e-commerce
Input manually dates or numbers that you remember well
Merge “First name” and “Last name” to “Full name”
Collapse optional forms
Use the right keyboard
BONUS: All you need to know about forms
It’s a very famous article and probably you already know it but if you didn’t, you MUST read Andrew Coyle ‘s Design better forms. This was my bible during the checkout redesign I did and it is still a great starting point when you must design forms.