This document provides dos and don'ts for designing mobile forms. It recommends labeling fields clearly, dividing long forms into chunks, using the right control types sized appropriately for mobile, connecting errors to the problematic field, accounting for the keyboard, indicating progress in wizards, and avoiding useless popups, duplicate navigation, wrong controls, and designs that don't consider limitations of mobile use. Guidelines include using inline labels, combining related fields, dividing forms into sections, right-sizing buttons and selecting appropriate date pickers, connecting errors to fields, remembering the keyboard, marking wizard progress circles carefully, indicating drag affordance, always showing loading progress, and avoiding popups, duplicates, wrong controls and designs ignoring finger limitations.