pcDuino
Well, I was smart enough to buy a pcDuino a couple of years ago. Then a year or so later I bought a pcDuino v3. Unfortunately, I wasn't smart enough to try use either of them. There are only so many projects one can work on in a week!
Just looking around today for documentation on getting started,it looks like pcDuinos have vanished off the planet.= https://s3.amazonaws.com/pcduino/book/Introduction+to+pcDuino.pdf
Next, I need to decide what to build.