I agree, assembling a computer is mostly something any idiot can do using the instructions and a little common sense. As for the order, last time I did this I went with the bare essentials (motherboard, processor, one memory stick, video card, power supply), checked if it booted, and then added everything else except for the hard drive. I did all the stress testing with an old 19GB 5.25" hard drive and only plugged in my normal drive (which was from my previous setup and still contained all my stuff) once I was satisfied with the machine's stability, so there was almost no chance of a bad CPU overclock damaging anything on the hard drive.
Also, it's a very good idea to do extensive research on your motherboard, since they all have some little quirks that you wouldn't otherwise know about until you run into them. It's very useful to be aware of things like memory slot channels, BIOS compatibility with CPUs, unlocked SATA ports, vcore undervolting, cold boot bugs, chipset fans obstructing video cards and even sneaky auto-overclocking of the video card.
I haven't gotten a bad component from a manufacturer (bad on deliver, that is. I've had a few die a month or two later) in almost five years.
Boy are you lucky.

I have gotten a bad hard drive, a bad video card and three bad monitors in the last few years. I mean, bad right out of the box.
Yeah. Still best IMO to do it while closing the tabs at the same time if possible, though. Another reason for slapping in the mobo last; you can grip both sides (top of DIMM & back of mobo) to make sure it's right good in.
Yeah, that is an absolute must. If you do it without pulling up the tabs simultaneously then you would need a freaking sledgehammer to get the things in. It actually wasn't quite that bad on the last three motherboards I used, but this A8V deluxe board required such insane force that I began to wonder if I was doing something stupid even though I had done it many times before.