So, I really wanted a way to send out an email for people to submit a choice without having to actually fill out a form. I wanted to do this to lower the barrier of entry for stating a preference in a form, but I think there are a lot of great ways to use this hack.
URL Tricks for Google Forms: Pre-populate, and Automatically Submitting Responses Justin Gale
URL tricks and secret parameters are the cool things that some people live for. If you snoop around in the right corners, you learn that Google had lots of undocumented or barely documented URL tricks or parameters buried in many of their products, and today I wanted to show you two of my favorites for Google Forms, and provide you with working examples to help you fully understand the tricks.