Buttons Alignment Policy - UX Planet
An ultimate guide to designing user-friendly forms | Dribbble Design Blog
An ultimate guide to form design: How to design converting online forms
Designing More Efficient Forms
Designing More Efficient Forms: Assistance and Validation
Designing More Efficient Forms: Structure, Inputs, Labels and Actions
Web Forms How-To Part 1: Simplicity
Keep signup forms simple and fast, and delegate as much as possible.