its an attitude of CAN DO that is required......
after the net goes down 'research' might become problematic.......therefore i suggest people practice NOW.
Might wanna get one of those $20 do-it-yourself home repair books at Lowe's before the EMP hits.

SOME people might yes.
i don't need it.
Do you frame with a framing hammer or a power gun?
I still prefer to do trim with a finishing hammer, nail punch, mitre box and a coping saw. Don't even need a tape measure.

I wonder what the best plumbing will be post crash? CPVC, primer and glue; or copper, torch and solder? Don't forget the pipe cutter. And fittings - Jeezus - all kinds of fittings. And that glue will get you pretty high in a tight space.

Get a pry bar and nail pullers for salvage work on abandoned homes. And hack saw blades that can be run into tight places by hand. Sawzalls need power.
Got spare roofing tar for around the chimney...? That stuff cracks in a couple of years. Number one source of leaks, IMO. Usually need tar on a shingle repair too.
Spare paint of a tolerable color in a 5 gal. bucket. I like Olympic's Commercial grade interior latex semigloss in Navajo White. Less than $10/gal and does a fine job with a durable, soft and neutral color. Would make a nice base for a color wash with some of your artist pigments in different rooms.
People used to have all this stuff well organised in the garage/basement. Now they are full of plastic pumpkins.