I should have posted this a long time ago as it is so useful for medical students. Get an Amazon Prime membership and you will get free 2 day shipping – order something today and it is on your doorstep the day after tomorrow! I went ahead and signed up when I was in medical school since I was ordering books every couple months and Amazon was always much cheaper than the University book store.
I was reminded today by a friend that you can try out an Amazon Student account first and get the 2 day shipping on anything Amazon sells totally free for 6 months. After 6 months if you do not cancel your membership you will be charged $49/year for up to 4 years instead of the normal $99/year for the full membership.  I believe all you need is a .edu email address, and if you are looking at this blog you probably have at least 1 or 2 of those 😉 right?
The only major downside to the Student Membership is that Prime streaming videos and the Kindle loaning library are only available with a paid membership (not during the 6 month free period). Anyway, I thought many of you might like to try it out.