Step 1: Capacitors
Solder the two 22pF (tan circles) crystal capacitors in the top right of the board, and two 100nF (burgundy rectangle) MCU capacitors on the top left of the board.
Step 2: Resonator + Resistor
Solder the resonator in the top right of the board, and a 10k resistor above that.
Step 3: DIP Socket
Solder the DIP socket in the center of the board. Make sure to match the notch of the socket with the notch on the silkscreen.
Step 4: ICSP Header
Solder the ICSP header in the top left of the board. The longer part of the pins should be coming out the top of the board.
Step 5: I/O Headers
Solder the 4 10-pin I/O headers to the 4 header spots around the edges of the board. The long part of the header should be coming out the top of the board.
Step 6: Moving the Atmega 328P from the Voltmeter to the Breakout
To remove the Atmega 328P from the voltmeter and transfer to your breakout (or vice-versa), use the DIP puller tool included in the kit. Trying to do it by hand can damage or destroy the 328P.
First, hook the puller's fingers around the thin edges of the DIP. Grasp the DIP puller with one hand, and hold the board down with the other, and apply constant force directly up on the puller. The DIP will suddenly break loose and come out. Make sure you pull up straight, or you may bend the pins on the MCU.
Install it into the breakout the same way you installed the MCU into the voltmeter.