Taking pictures can be a lot of fun. You can take a picture of just about anything, and the possibilities are literally endless. When it comes to taking pictures, there is no set way to do it because everyone's technique and style is different. The best photographers didn't stick to the rules and made their photos their own. There are, however, some rules that you do need to adhere to so your pictures come out right the first time.
Before anything else, you need to acknowledge that you are the director. You ultimately decide how your photos will turn out, and you need to take control of the reigns so your pictures come out the way you want it to. Be the director and move around the people or objects in your photos to your liking. Manipulate the camera and experiment with the many scene modes.
One of the toughest things any new and even experienced photographer can have difficulty with is working with lighting and the camera's flash. Whenever possible, natural lighting is best, but even natural lighting can completely mess up your picture if you don't know how to work with it. If you're taking photos outside and it's sunny, make sure you are not directly behind or in front of the sun. If the sun is directly in front of you, the subjects in your photos will come out underexposed, or darker than they should be. If the sun is behind you, then the subjects will be too bright.
Telling everyone you are about to take their picture is good sometimes, but it's good to catch them completely off guard, too. Not everyone is photogenic and can produce the perfect smile on command, so you might get forced and unnatural smiles. Taking pictures of a group of people laughing when they don't know you're shooting will produce more natural and relaxed photos.
To get better at any skill, you need to practice, practice, practice! You must experiment with your camera and learn all of its features inside and out. It is a complete waste when you have a plethora of features and scene modes, and you don't even utilize each one to its fullest or find out what each feature is capable of doing. Most people who own cameras have not tested out what each mode does and takes pictures with the automatic or default setting. Try taking multiple photos of a single subject from different distances, with different settings, and with and without the flash. Take note of the outcome so you can know what settings to use with your other photos.
Last, be creative. Let your inner creativity shine through, and you will take pictures that will make you happy and leave a lasting impression.