Maker’s Business Card is Actually a PCB, with Common SMD Components Reference Chart
Maker Ilia Baranov aka “Mr. Robot” designed these business cards that are actual PCBs, printed by DirtyPCBs, so you can practice surface-mount soldering common package types (QFP, SOT223, SODs, etc. – there’s room for one through-hole resistor as well), along with reference guides for trace widths, American Wire Gauge standards, and more. Brilliant!