I initially wrote this cheat sheet when I had to migrate from MPE to Unix. I kept adding to it as I picked up new knowledge. It covers many shell commands, using vi, system management, performance, writing scripts, etc. It is reasonably large now and includes an index at the top to help you jump to the right section.
How to use Eagle to Create a Schematic
This is the procedure I follow to go from a hand-drawn schematic to adding it into Eagle and producing a printed circuit board (PCB) layout ready to be etched.
These are various procedures I need when 3D printing.
Big Dan the Blogging Man 