The following items have had basic "how-tos" requested. Per the thread with the original quote, these should be more like a cross between a user manual and a FAQ than like a strategy guide. This thread exists for that purpose - the posting of drafts, critiquing and rephrasing thereof, and suggestions for additional topics. I'll be reserving a bunch of posts after this so that the individual topics can each get their own posts.
As a note: I'm not positive I get the flashbangs part well enough to write it, but I'll give it a shot.
Basic Concepts (Campaign)
Research
Production
UFO Interception
UFO Disassembly
Nation Happiness
Basic Concepts (Ground Combat)
Time Units
Reaction Fire
Soldier Weight and Encumbrance
Wounds and Healing
Auxiliary Equipment
Please note that we want these to be very simple, short, clear and straightforward. Consider this a how-to on the absolute basics, not a strategy guide. Please also realise that I or others will probably change and edit any text you contribute, but a head-start will still be appreciated.
If there are other concepts that need to be explained, suggest them, but don't feel bad if we reject. This is really just the basics, not a full manual.