This is a quick Instructable, showing how I added a reset button to my Raspberry Pi 2.
The Pi 2 has two hearder pin holes next to the display socket, which is marked "RUN". When this pins are shorted together, the Raspberry Pi 2 will reboot.
Step 1: Tactile Switch - B1719
I had a couple of these tactile switches, and decided to modify it slightly to fit the Raspberry Pi 2.
1 - Using long nose pliers, I first straightened each leg.
2 - Then, bend each leg as shown.
3 - Solder the tactile switch onto the Raspberry Pi 2.
Step 2: Reset Switch Fitted to Raspberry Pi 2
Solder the switch onto the Raspberry Pi 2.
Hope this was usefull.