If you don't want to rely on an obscene/racist mnemonic to help you figure out the value of resistors based on their colored bands, you can make this nifty papercraft resistor decoder from Adafruit.
It’s the newest tool in our Circuit Playground -- when you can’t get to your iPhone or iPad, use paper! One side helps you read 4-band types and the other side takes care of 5-band types. The Resistor Helper is on Thingiverse as a PDF (with Illustrator editability preserved). Designed by Adafruit with Matthew Borgatti.
Resistor Helper – Papercraft Resistor Calculator
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