Below you will find some useful resources covering topics such as the exposure triangle, focusing, metering, colour theory, and some general tips.
The Exposure Triangle - General
The Exposure Triangle - Aperture
The Exposure Triangle - Shutter
The Exposure Triangle - ISO
Focusing
General Tips - 1
General Tip - 2
Black & White Photos
Colour Theory
Common Photo Problems+
Metering
Back Button Focus
How to do Steel Wool