How to measure power consumption of arduino fio ?


I am new to Arduino. I have arduino fio and xbee shell and I want to measure the power consumption of the fio while running algorithm and transferring information.

I have constructed a serailly connected circuit with fio, resistor and a power supply. However, I cannot measure a current because the board did not work.

Could you please give me some advice on how to measure the power consumption and for this purpose which procedure should I follow ?

Thank you!