Read the dials on your kilowatt hour meter from right to left. There are typically four or five dials. Look at the dial on the far right to get the first number of your recorded electricity usage.
Write down on a piece of paper the number the dial is pointing to. If the pointer on the dial is between two numbers, write down the lowest number. For example, if it is between 7 and 6, write down "6." One exception is that if a dial is between 0 and 1, write down "1."
Look at the next dials and record their number in the same fashion. If you have one of the newer digital meters, simply look at the numbers in the display, which is easier than getting the number off of individual dials.
Subtract the amount of electricity you've used so far from the amount on your last bill to get an idea of your current power consumption.