If you haven't heard of Amazon Prime, it's their service where you can get free two-day shipping, and one day shipping for $3.99 per item. It typically costs $79 for one year, but now they currently offering it free for one year to students. you just ave to provide your school email address, and tell them the name of your school and your major.
http://www.amazon.com/gp/student/signup/infoThis is being marketed towards college students but all you need is a valid .edu email address, so teachers and alumni might be able to benefit from this too (though the Terms of Service does say they have the right to ask for proof that you are a current student).
I wanted to pass this along and hope someone else can get use out of it while it's being offered.