The Ardweeny: the little friend of the Arduino (and how to beef it up)

Step 2 Soldering of the capacitors

Start with the 0.01uF capacitors. They aren't polarized so you can position them in the way you want as long as you put one each into rectangle C1 and C2.

Snug them down, solder them in, and trim off the excess leads poking out from the bottom of the PCB.