Another tip I got taught while out on a field trip. Similar to selecting a specific focus point and even easier!
It turns out that there are several buttons/functions that are activated when you half depress the shutter, and you have a few seconds after the shutter press to select any of them, and change them. Exposure is one of them.
Step 1 – half depress the shutter button to focus on your image
Step 2 – click the Control Dial up or down depending on if you want to increase or decrease the exposure
You will see the little bar on the Exposure range move depending on which way you move the dial. You will see this both in the viewfinder and on the top screen