Above is a video detailing one method for populating a two sided surface mount PCB. We covered using a stencil to apply solder paste for a PCB a few weeks ago. In the comments there was a debate ...

Having seen a number of PCB business cards [Will] decided to ... of the standard 1.6mm which affords more thickness for the surface mount parts. The BOM totals: 15 ICs, a coin cell battery ...