RG Keen has some info that might help explain most of your concerns
http://www.geofex.com/On that note, I recently discovered that by using high speed grounding rules as per Howard Johnson's book High-Speed Digital System Design: A Handbook of Interconnect Theory and Design Practices ISBN: 0471360902
works VERY well, even in lo-speed designs like guitar amps. There is also a JPL proprietary spacecraft packaging manual, JPL D-8208 REV I and Electrical Grounding Architecture for Unmanned Spacecraft NASA HBK 4001 that actually utilizes most of H Johnson's prctices (published a few years after JPL's docs). Thge there's Henry Ott's practices which H Johnson and JPL both get and acknowledge as resources.
This may seem over the top, and obviously, a lot of shoddy layouts actually work, but if you want insurance.......
Then there's the aspect of waveform development that is NOT freq dependent, risetime. And if you look at how resistors are made, you might find things to consider when choosing resistors, CC or otherwise, for 'MOJO'.
All this to say......what were you asking about?