Route all clock traces in a radial manner. Do not daisy-chain. Provide a series resistor for each radial trace with a fan-out of one device per driver, if possible.

Calculate the series resistor to be greater than or equal to the source impedance of the driving component and lower than or equal to the line impedance.

Do not use stubs or “T” connections on clock signals unless electrically short.

Calculate the value of the decoupling capacitor for individual traces based on the impedance of the circuit/trace and self-resonant frequency of the network. 

Use oscillators for frequencies above 5 MHz or clock skews faster than 5 ns instead of discrete components or crystals.

Make provision for additional grounding of oscillators cases.

Crosstalk may be eliminated by routing traces 3-W. This rule states that “the distance separation between these traces must be three times the width of a single trace, from centerline to centerline.

Locate drivers and control logic as close to the I/O connector as possible to minimize trace length and RF coupling of both common- and differential-mode currents. Place filtering components between control logic and the I/O connector.

Use data line filters, ferrite devices, or isolation transformers for connection between noisy and quiet areas. Do not allow unnecessary inductance to be developed in both the signal and signal returns traces. The signal return trace may also be a ground plane. This includes use of inductors and ferrite beads. Make the ground return trace, if used instead of a ground plane, three times the width of the power trace.