If you're planning on doing a lot with Arduino then I suggest you get one of these: http://www.rapidonline.com/Electronic-Components/Mr25-Metal-Film-Resistor-Kit-13-0270/?sid=8eda8e7d-c560-49b5-a97a-95f4d637431e
If you're planning on doing a lot with Arduino then I suggest you get one of these: http://www.rapidonline.com/Electronic-Components/Mr25-Metal-Film-Resistor-Kit-13-0270/?sid=8eda8e7d-c560-49b5-a97a-95f4d637431e