Approach

Before you even get the camera, think about what you want to capture. Is the way he lays to sleep? In the couch or bed...?   Or how he reacts when he hears you put down the food? The way he exercises?

Focus is important to get a clear image. Remember that the autofocus system works much better when the camera approaches a solid object, like his nose or the collar, better than trying a bunch of hair. If your dog or cat is moving remember that the distance from the camera changes, you may have to compensate by focusing and refocusing all the time so that when the perfect time comes, you can capture a the most possible clear image.

Be very patient

Your pet does not understand that you're trying to take a photograph.   So you will have no choice but to wait for the perfect pose he wants to put himself. Let him relax and do not pressure him. If you want him to look into the lens, try holding a prize above the camera to capture their attention or make any noise that makes him sit still for a moment.

Avoid Flash

Generally photos with flash do not give very satisfying results for some pretty pictures of your pet. Some dogs and most cats are frightened with a light so bright and sudden, also the flash tends to "blanch" the color coat of animals. Natural light (outside or coming through the curtains) is less "traumatic" for them; it gives better results when capturing the true colors. If there isn’t enough light, the good thing about digital cameras is that the photos can be corrected with computer technology if they are a bit dark.     

Prepare your camera

Make sure you are using the right target. If you use a single-lens reflex, you may prefer to use a higher magnification zoom that allows you to make very detailed photos from a distance, without   having to spend all the time glued to your dog or cat.  

Animals move very quickly, you should set your camera on a quick exposure mode, so you do not end up leaving blur. In an SLR choose a fast speed (1/200 or higher) and let the camera choose your own exposure setting. If you're using a compact camera, choose the mode "sport", which is pre-programmed to take pictures in motion. If your camera allows you to do continuous shooting, also select this option, with some luck you can capture a fantastic sequence of your dog in action.

Consider the scenario

A good photo is not achieved only by focusing on the target. Consider the scenario also a photo of your pet. What will be the bottom? Your yard, your bed, your living room...? Or do you prefer to display only him / her? If your camera allows you to adjust the lens to have more opening (low f number of 4 or less), you can take pictures with a very artistic effect using the "field depth” to get clear of the blur behind your pet.

Think also of the firing angle. If you want your dog out ... make thoughtful photo from the side, I want to come out looking directly at the target? ... Kneel to put up with him.  

Family and friends

Why not people in the photos with your dog or cat. It will be more special if loved ones also appear. Sometimes, the simple inclusion of some arms around the dog or cat is enough to give an emotional touch to the image, and it can be a good way to keep a dog quiet and hyperactive, at least long enough to take the photo. 

Last tip...

Do not be discouraged at first and keep trying. The more your pet is familiarized with the camera the more natural behaviour. So keep trying taking snapshots of your dog or cat and you will be delight every time you look.