Collection of PCB design tips

This post contains the resources for PCB design using Eagle PCB from Cadsoft.

Eagle PCB

CadSoft Eagle - Picking a grid size
https://youtu.be/xCMcexRX2Lk

Backwards dimensions in Eagle - My dimensions in eagle are all backwards when I place them. Does anyone know how to fix this?
http://forum.allaboutcircuits.com/threads/backwards-dimensions-in-eagle.96215/

How do I change a board outline shape/size in Eagle Cad Light?
https://www.element14.com/community/thread/23621/l/how-do-i-change-a-board-outline-shapesize-in-eagle-cad-light?displayFullThread=true

A beginner's guide to making an Arduino Shield PCB
https://aaroneiche.com/2010/06/24/a-beginners-guide-to-making-an-arduino-shield-pcb/

Long CrossHair cusor
https://www.element14.com/community/thread/22983/l/long-crosshair-cusor?displayFullThread=true

Find missing airwire to route
https://www.element14.com/community/thread/15226/l/cant-find-a-missing-airwire-which-i-have-to-route?displayFullThread=true

Ref-Package Library Not showing up
https://www.element14.com/community/thread/19865/l/ref-package-library-not-showing-up?displayFullThread=true

Eagle CAD: method of re-linking schematic and board?
http://electronics.stackexchange.com/questions/176807/eagle-cad-method-of-re-linking-schematic-and-board

From Sparkfun

Better PCBs in Eagle
https://www.sparkfun.com/tutorials/115

Using EAGLE: Board Layout
https://learn.sparkfun.com/tutorials/using-eagle-board-layout/arranging-the-board

Using EAGLE: Schematic
https://learn.sparkfun.com/tutorials/using-eagle-schematic

Using EAGLE: Board Layout
https://learn.sparkfun.com/tutorials/using-eagle-board-layout

General Tips

14 Tips to improve Arduino Schematic and PCB
https://youtu.be/2GlWCwyEKuM

EAGLE MEETS SKETCHUP - turn your Eagle layouts into 3D models
https://eagleup.wordpress.com/

Eagle: how to refresh project with updated library
http://forum.arduino.cc/index.php?topic=1444.0

Is it possible to move names and parts separately in board edit mode in Eagle?
http://electronics.stackexchange.com/questions/129088/is-it-possible-to-move-names-and-parts-separately-in-board-edit-mode-in-eagle

Eagle PCB Undo Autorouting in One Step
http://43oh.com/2011/11/tip-eagle-pcb-undo-autorouting-in-one-step/

Cadsoft EagleCAD Tutorial - Layer Manipulation
https://youtu.be/19uUoPrTzgQ

Adding mounting holes to a PCB
http://www.lucidarme.me/?p=1656

Unroute a complete PCB in Eagle
http://lika.be/wp/2008/12/unroute-a-complete-pcb-in-eagle/

Eagle QuickTip: Measure Trace Length (and more)
https://blog.adafruit.com/2012/02/13/eagle-quicktip-measure-trace-length-and-more/

Can't find a missing airwire which I have to route
https://www.element14.com/community/thread/15226/l/cant-find-a-missing-airwire-which-i-have-to-route?displayFullThread=true

Errors

Stop mask errors in DRC
http://electronics.stackexchange.com/questions/122722/stop-mask-errors-in-drc

Learning Resources

Fedevel Academy
http://www.fedevel.com/academy/

28Pins
http://www.28pins.com/

Tools

Trace Width Website Calculator
http://www.4pcb.com/trace-width-calculator.html

USB

USB cable schematic pinout
http://pinoutguide.com/SerialPortsCables/usb_cable_pinout.shtml

Why USB Data Series Resistors?
http://www.eevblog.com/forum/projects/why-usb-data-series-resistors/

How critical is the layout of USB data lines / how does my layout look?
http://electronics.stackexchange.com/questions/41851/how-critical-is-the-layout-of-usb-data-lines-how-does-my-layout-look

Layer

Every Layer in Autodesk EAGLE and What You Need to Know About Them
https://www.autodesk.com/products/eagle/blog/every-layer-explained-autodesk-eagle/

References

What’s the difference? M, mm, ml, mil
https://www.containerandpackaging.com/blog/2010/03/whats-the-difference-m-mm-ml-mil/