Is it better to order at the beginning or end of the week?

If you want to get your order as fast as possible, it's best to order before noon EST Monday through Thursday. Orders placed by noon EST Monday - Thursday ship the next day. If you order on Sunday by noon your order goes out Monday. If your order is placed after noon on Thursday it won't ship until Monday.
Either way, your order should arrive 2-3 days after it is shipped. If you want your order to arrive a little faster than that, add the Get It Faster option to your cart.