Order the Form Logically

Questions should be organized and asked logically from a user’s perspective, not organized according to the application or database logic. For example, it’s unusual to ask for someone’s address before their name. Stick to these user-friendly standard sequences both for fields (e.g., Credit-card number, Expiration date, Security code) and for value choices (e.g., Standard shipping, 2-day shipping, 1-day shipping). But for field values, also consider usage frequency, and list the most common values first when possible. 

The Starbucks iPhone application, which includes a mobile form to let you customize your drink order, unfortunately, hides the full ‘Decaf’ option off-screen to the right, requiring horizontal scrolling. If the full ‘Decaf’ is more frequently selected that the other options, it should be displayed first.