TIP #084: Place hot components on the top
Why? Heat goes up. Also it may be easier to connect them to one big heatsink.
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TIP #083 Be aware of different connect styles used to connect through hole pins or VIAs
Why? For example wrong connect style can make soldering very hard or it can limit maximum current.
TIP #082: Always add assembly drawing layer into your footprint (if your CAD system supports it)
Why? It’s then easier to create assembly drawing layer.
TIP #081: Place components in the schematic close to the pins where they should be located on PCB
Why? It helps during component placement. Placement of some components is very important.
TIP #080: Add testpoints
Why? They are useful during debugging and they can be used during manufacturing and production test.
TIP #079: Name every important net in your schematic, even if …
Why? During layout you immediately know what net you are routing.
TIP #078: Preferably use through hole connectors
Why? After some time, SMT may fell of the board … together with some tracks.