I urge everyone to buy a digital kitchen scale.
Analog scales are charming, but digital scales are precise.
I recommend and use the Escali Primo. For around $25, you get a lot of bang for your buck!
Press the On/tare button to zero out the weight of the scale so that you're only weighing your ingredients without having to subtract the weight of the bowl.
After weighing each ingredient into the bowl, press "tare" again to reset to zero.
For example, weigh out 4 oz butter, press the tare button, and weigh out 6 oz sugar right in with the butter.