Update 10/04/2019 - Getting to Blinky 5.0
Contextual Electronics just updated their tutorial series to KiCAD 5. I recommend that you start here.
[This area is out of date, leaving for posterity.]
Getting To Blinky 4.0
This is where I recommend everyone start for learning KiCAD. It's an entirely step-by-step tutorial that gives you the foundational knowledge required for using KiCAD.
Keep in mind this Tutorial was written for KiCAD 4.0 and KiCAD 5.0 is a little different. I would recommend installing KiCAD 4.0, following Chris's tutorials, do a couple of simple projects for fun, then upgrade to KiCAD 5.0. Chris is working on an updated 5.0 series but if you want to start now that is what I would recommend.
[/end of out of date]
svg2shenzhen Inkscape Extension
This is the plugin that I talked extensively about and use a great deal for my projects.
How I make Shitty Add-ons
This is the stream I did in June on how to make SAOs.
PCB Color Reference Spreadsheet
This applies only to PCBWay, and is only meant to give you a rough idea of what to expect.