Flubaroo has quickly became one of my favorite tools. It is a script for Google Forms that will automatically grade your quizzes for you. I have heard of it several times before, but never really took the time to learn it... little did I know is how much it would be worth it!
You first create a quiz in Google forms, and then add the script Flubaroo. Flubaroo then looks over your questions and decides if the questions are for a point value or if they are just a question to identify the student (you can change this as you see fit). Then it will ask you to select one of the responses as the answer key and this is when the magic happens. Within seconds you are given a graded quiz and have the option to e-mail the students a copy of their scores. I must use this in the future!