Copying installer ISO to USB Flash

[Richard Owlett <rowlett@access.net>]

Having machines with different constraints I have downloaded DVD1 and 
Netinst ISO's. I have flash drives with obsolete ISO's. For reference I 
have [ https://www.debian.org/CD/faq/#write-usb ] available.

Questions:
1. Do the flash drives require any prep?
   [ Gparted gives warning messages on both. ]
2. I've casually followed recent discussion on appropriate dd options.
   What was the conclusion?
   What was the subject line {i have local copies}?
3. Not having done a "from scratch" install recently, is there something
   I haven't thought to ask?

TIA