You can use the PLL. It works well. It is driven from the 8 MHz internal oscillator so it can be tuned to about 1% of the target speed.
During development the RESET pin should be help high with a pull-up resistor. 10 k ohms works well.
When you no longer need to reprogram the processor you can tie RESET directly to VCC.
As @CrossRoads mentioned, you need to include a 0.1 uF capacitor across VCC and GND as close as possible to the processor.
So, three parts during development (processor + resistor + capacitor), two or three parts when you deploy.