7) Layers - ithe below could be a good alternate way to teach the fundamentals of layers and simultaneously advertise Paint.net. Because I'm not so sure everyone can catch on to the more sophisticated tutorials, since they may have not grasped the concept that the actual most background layer is itself "painted".
See, I somehow confused the White canvass and its Transparent background, as being the layers themselves for crying out loud. And nobody had been explaining that! I was like a baby who didn't know HOW to ask, because I didn't have a handle on the entire concept yet!
That's what had stymied me for months, until one single solitary YouTube video helped me realize that (and even that video took me forever to find, after plowing thru countless ones, because it lacked pertinent key words).
Which is why I created the below. It may prove a big help to at least some newbs if a less-rough form were put onto YouTube, with pertinent keywords.
(keywords such as "paint, layers, dummies, basics, etc.etc.)
Amateur as I am, this took me many hours, just finding a host, and then the JPGs weren't displaying, so I had to search for yet another host, yada yada.
Yes, I know its ugly and requires beautifying by experts. Look, I used what I had in the house - an old brown posterboard, old markers, etc. Maybe you have a prettier posterboard, and better markers. And it may be preferable to animate it, rather than still-photo's.
On 2nd thought I sometimes get dizzy from animations, since the demo's click on toolbars at too high speed to grasp. So it's better to flash photo+text-tutorial per each screenshot, then forward slowly to subsequent screenshots.
Again, my emphasis was on demonstrating to you another way to initiate Newbs, not to win a beauty contest, of which there's plenty to spare in these parts
http://powerpics.tripod.com/paint/paint_layers_dummies.html