Reddit mentions of Signal and Power Integrity - Simplified (2nd Edition)

I'm mostly self-taught, so I've learned to lean heavily on App Notes, simulations, and experience, but I also like these books:
The Howard Johnson Books:
High Speed Digital Design: A Handbook of Black Magic
https://www.amazon.com/dp/0133957241/ref=cm_sw_r_cp_api_I0Iwyb99K9XCV
High Speed Signal Propagation: Advanced Black Magic
https://www.amazon.com/dp/013084408X/ref=cm_sw_r_cp_api_c3IwybKSBFYVA

Signal and Power Integrity - Simplified (2nd Edition)
https://www.amazon.com/dp/0132349795/ref=cm_sw_r_cp_api_J3IwybAAG9BWV

Also, another thing that can be overlooked is PCB manufacturability. It's vitally important to understand exactly what can and can't be manufactured so that you can make design trade offs, and in order to do that you need to know how they are made. As a fairly accurate intro, I like the Eurocircuits videos:
http://www.eurocircuits.com/making-a-pcb-pcb-manufacture-step-by-step

Make sure you have the emails/phone numbers of the Support or Application Engineers and FAEs from different component vendors (Philips, Xilinx, Altera, TI, Analog Devices, Samtec, etc). Also, keep in touch with part distributors (Avnet, Arrow, Future, etc) since they also have local Application Engineers.

Yes, they'll only help you if you use their products, but for the most part they will be fine.

As u/j_lyf mentioned, look at Application Notes and White Papers from manufacturers since they are pretty much recipe books for specific designs (chips, power bricks, connectors, etc).

Consider buying the book Signal and Power Integrity by Eric Bogatin.

Also, are you in the SF Bay Area? Registrations for PCB West (September) are already open. If your boss has the budget, ask him for money to take the paid courses. Or at least attend the free ones.

Eric Bogatin's book "Signal Integrity - Simplified" Howard Johnson's High Speed Digital Design and Mike Peng Li's Jitter, Noise, and Signal Integrity at High-Speed are all fantastic reads if you are looking for dead tree material. if you have a Safari subscription you can read Bogatin's and Li's books for "free"

http://www.amazon.com/Signal-Power-Integrity-Simplified-2nd/dp/0132349795/ref=sr_1_1?ie=UTF8&qid=1463916853&sr=8-1&keywords=power+and+signal