1. Make sure the first question is "student name." Otherwise you won't know who submitted which answers.
2. You can mix question types (multiple choice, short answer, paragraph) but if you have too many types and too many students, the spreadsheet can become difficult to navigate.
3. When embedding the form into a blog, make sure you edit the width to fit within your blog's main column. You can use the same principles of editing the size of a YouTube video for editing the width of a spreadsheet.