Amen to #1. Possibly that could be expanded to include the feedback
loops -- keeping them as small as possible and putting the terminating
leads as close as possible to the input pins also works miraculous
wonders.
In addition to #2, a couple more lesser caveats might be in order:
* Always bypass the power supply for anything faster than an LM358
(and sometimes even then), and keep the AC impedance of the bypasses
to GND as small as possible. Memorize the venerable Analog Devices
appnote AN-202, "An IC Amplifier User's Guide to Decoupling,
Grounding, and Making Things Go Right for a Change". This appnote was
written in the days when dinosaurs ruled the earth and AD still made
modular op amps, but its advice is still just as valid.
http://www.analog.com/UploadedFiles/Application_Notes/135208865AN-202.pdf
* Always look carefully at fault conditions, and make absolutely sure
the input voltages will never exceed absmax under any circumstances.
Again, careful planning with GND impedances is necessary. An op amp
input can be grievously damaged, but still kinda function, causing no
end of headaches.
Textbook stuff is great as far as it goes. But the OP might just want
to open up good audio equipment, especially older stuff from the
seventies and eighties, and look carefully at their schematics. The
additional practical methods to make things work well and reliably are
right in front of him, if he takes the time and effort to learn from
them.