Suggestions from a frequent user (2/2)

In PCB drawing
Place the pin1 marker outside of the component
Write component values outside of the component
Place the grid origin in a meaningful place (and mark it!)
Always place pin-strip devices on a 2.54mm grid
Place mounting holes at an even distance (e.g, 5mm grid)
Add extra "mechanical" copper for all connectors
Make pads bigger than suggested, for hand soldering
Use square-angle routing between different layers
Bless the board with a unique name, funny if possible
Provide a "sticker" area  for the serial number
Proudly sign your device

My personal Suggested sizes
References and values: 0.7mm (1.4 tick) or 0.5mm (0.1 tick).
Tracks: 0.2mm, 0.4mm, 0.8mm
Clearance: 0.018mm
Grid: 1mm (or 0.5mm) for components, 0.25mm for tracks
Vias: 0.8/0.6 or 0.4/0.2 if needed; bigger for power.