I'm often asked what is the best way to learn about photography. So many people have great digital SLR cameras and can take amazing photos but the first step that will make your photos look better is not only the equipment but learning the basics of photography first.
There are so many resources online that can teach you everything you need to know about photography theory. If you take the time to learn the technical aspects of photography such as shutter speed, aperture, ISO, focal length, colour temperature, etc it makes things so much easier down the track and will allow you to be a better photographer.
This is the article I always recommend that people read to start with, it can be a little confusing the first time but if you keep at it you'll master the basics of photography and you'll have a huge advantage in the future.
A Tedious Explanation of the f/stop