= Schematics = * Net-names, use shared labels when components on schematics are not close together or when drawing a wire would be too messy. * Avoid wire cross overs. The fewer the better. * Don't run wires over components. Few to no exceptions for this one. * Higher voltage at top, lower voltage at bottom. * Inputs on left, Outputs on right. * Align labels with parts = PCB Layout = * GND is critical and must be either wide traces or a good plane. * Power is next most critical and should have a bypass cap next to each load and should also use heavy traces or planes. * Primarily horizontal traces on one layer, primarily vertical traces on other layer. * Short traces are better - Frequency of signals?