Booting Raspberry Pi from USB drive
The Raspberry Pi has been a bit slow running WordPress. I read, however, that it can be made faster by running off of a USB stick. This has been dealt with quite well from a few other sites, so I will not go into detail with it. I will list the sites I used:
The first site I liked because it had a description of how to identify the USB drive you are booting from at "part uuid," since if you have more than one USB drive plugged in, Linux will assign /dev/sda1 to a random USB drive. Unfortunately, you cannot specify a uuid in the /boot/cmdline.txt, but you can specify a "part uuid." In order to do this, you need a utility called "gdisk," as described in A above.
On my system, I used a Patriot XT Xporter, 8GB. So far, so good. And WordPress seems to be running MUCH faster off the USB stick. I did read that if the USB stick wasn't high enough quality, it could fail. We will see!