Here are a couple things to keep in mind when you pick up a camera to take some photographs!
1) See The Light
Before picking up the camera, find out where the light is coming from, depending on the shot you may want to look towards it, or away from it. This will help you establish the shot.
Depending on the type of photo you may want your subject centred, or off to the side. Remember the rule of thirds. Breaking the image down into thirds so you have nine parts. Position of the subject makes a big difference in your photo!
If you are shooting outside in the middle of the day, a lower ISO, about 100/200 should be used. If you are shooting at night, increase the ISO to be higher, at about 800/1600, so that the camera's sensor is able to record light. Don't forget that increasing the ISO increases the grain/pixel size of the image.
We hope these help make your photo taking process a little easier!