When I'm teaching, students usually express a desire to learn how to shoot a "perfect" shot... "What's the exposure I should always go for?"
My answer, I think, frustrates them. The exposure you use depends on what you're trying to capture and convey to your audience. If you're trying to freeze your kid making a game-winning goal, you're going to use different settings than if you are trying to shoot the inside of a flower... and if you're shooting said flower, you have to decide if you want to show it as a scientific specimen or if you want to call on your inner Georgia O'Keeffe and portray the seductive beauty of the plant.
It all starts with what you see in your own mind.
Our equipment is only a means by which we communicate our creative intent to others. Cameras are marvelous tools of creativity, but they do not possess the creative spark without human input and direction.You have to know what you're trying to communicate before you reach into you camera-bag-of-tricks... or you can just pull your camera out and figure it out as you go along if you're open to working through the process.
Start with what you're seeing in your mind... That will tell you how to get your "perfect" shot...