Photography-101 infographic cheat sheets perfect for any amateur photograper. These are really useful.
good tips for good photography
Aperture effect chart
Metering 101: How To Use Your Camera's Metering Modes :: Digital Photo Secrets
Shutter Speed Crib Sheet
Step by step guide on how to use a grey card to set both white balance and exposure. Photography Tutorial by Live Snap Love
When I give my photography classes, I always show this as opening a door to a dark room. The wider you open the door to let light into the room is the aperture, while the shutter speed is how quickly you open and close it - Miko
Photography Kick-Start Guide: Adjusting Your Camera’s Settings for the Photo You Want — Tuts+
Focusing and Metering in Different Places. Ehhh explanation, need to find more info on this for Nikon.