You could buy some calipers. They are fairly cheap and are good for tracking change over time.

These are the cheap pair: http://www.amazon.com/Accu-Measure-Fitness-Personal-Caliper-Measurement/dp/B000G7YW74

And for a few more dollars, these seem like they would be more convenient: http://www.amazon.com/dp/B000NN9SDO/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=31VY55A8AMG4Z&coliid=I2Y1Q0J7STB37J

Calipers are the way to go. Scales are junk for measuring bodyfat.

http://www.amazon.com/Creative-Health-6575XXXX-Skinfold-Caliper/dp/B000NN9SDO

Google how to do a three point test - you can do it yourself. You grab a measurement from your belly, pec, and thigh.