Homebrew PCBs

Teardrops, named for their shape, put extra copper at the intersection
of traces and pads.  The idea is to ensure an electrical connection
between the trace and the pad by avoiding disconnects due to drill
misalignment, etching issues, or the mechanical fragility of the
inside corner (the case that actually bit me).

I have pictures of the teardrops I use here:

        http://www.delorie.com/pcb/teardrops/

and boards built with them:

        http://www.delorie.com/electronics/usb-gpio/usb-gpio-pp.pdf
        http://www.delorie.com/electronics/r8c-27-adapter/r8c27-dip600-pcb.png