Make important nodes accessible
It will eventually happen that you are trying to figure out why something is not working and you want to measure a signal inside your PCB. Before designing the PCB, you should think which points will be important to troubleshoot your circuit and, in case they are not easily accessible, add a test point somewhere connected to them. There are various forms of test points, but the ones that form a loop are great for test probes with hooks.
Give space between components
It is tempting to pack the components as close as possible, only to realize that there is no room for the routing of wires. Give some space between components so that wires can spread. The more pins the component has, the more space it will need. Spacing will not only facilitate auto-routing as it will make soldering easier.
Print the layout to see if components’ sizes match
Exchange wiring directions between layers
Select the width of lines depending on current
Know the specifications of the manufacturer
Avoid 90º angles with traces
Address: 3rd Floor, A1 Building, FuQiao Third Industrial Zone,FuYong, Bao’an District, Shenzhen,China