Here is the list of most common high speed design rules
I suggest the following best practices for PCB routing:
1) Ensure proper impedance by maintaining single-ended and differential pair impedance.
2) Length match buses and differential pairs, and consider including length in the package.
3) Length match differential pair signals within the pair.
4) Route signal groups with the same topology.
5) Keep at least a 3x track width (ideally 5x) space between waves.
6) Be aware of tracks running in parallel.
7) Use stitching VIASs when reference plane changes.
8) Avoid using 90 degree angles.
9) Avoid stubs.
10) Do not cross planes.
11) Keep signals away from the board edge.