This is very difficult to accomplish but is quite stunning when it is done well. Automatic mode is a compromise between the above settings. It is most similar to Landscape mode. Once you choose the mode for your photograph, it is important to focus on the most important part of the subject. With flower close-ups or portraits, that is usually the center of the flower.
Most cameras have their focus point in the middle of the viewfinder.
If you always put your subject in the middle, your pictures become quite predictable and boring. Try the following technique. Make sure that you start with the center of your viewfinder on the most important part of your subject and partially depress the shutter button to engage auto focus. Then, keep the button partially depressed and reposition your camera so that your subject is off-center in the viewfinder. Next, fully depress the shutter button to take the picture.