HOWTO: Booting Linux from a USB drive (c) ...

I have received a few emerged questions concerning mounting usb flash drives with linux I've decided to expound on this matter as the idea of having a full-blown pc in a pocket is rather attractive. In fact this is a brief overview\howto of what to read to have the things up & running.
{yep, I'm too lazy to write the same in my own words & why the hell should I?!}