I'm not sure how much of a beginner you are but for anyone that is learning, muscle memory is key. This comes from repetition and can be a detriment to you if you are doing something the wrong way. The biggest thing i feel like you should focus on right now is standing correctly and stroking at the ball correctly. It really doesn't matter if you are missing balls at this point, in fact missing balls is very important at this stage. This guy is 18 and has pretty much a textbook stance and stroke:
http://www.youtube.com/watch?v=1HYQjoHjwL4
Just try and copy him, it will improve your game tremendously. Part of what he does that is Incredibly important for you is to stay down, stay down, stay down, after the shot. Remember how i said muscle memory is key and that missing balls is very important? Here's why: when you are looking down the cue and actually strike the cue ball you are either going to make the shot or miss it. Staying down on your shot allows you to see whether the ball was made or missed FROM THE PERSPECTIVE OF SHOOTING. It's very imporant to see whether or not the ball went in from the perspective of where you shot it from. Every time you make or miss a ball your brain is subconsciously recording exactly what you did during that shot, and what happened. The only way your brain knows what the outcome of the shot was is with your eyes. If you see the shot go in from the perspective of where you shot from then the next time you are about to shoot that shot your brain reminds you that if you, hit the cue ball here, it goes to here, hits the object ball here, and the object ball goes here. Your brain needs to know the outcome of the shot before you hit it and if your brain has seen this shot play out many times before from that perspective than making the ball is relatively easy. If you jump up after the shot your entire perspective of the shot changes therefore makin it MUCH harder to imagine the ball going in from your final shooting position. Obviously there are a million ways to mess up a shot but as long as you see the outcome of the shot from the same place that you shot it from your body and your brain will remember.
Now I'm not saying don't think about what you are doing at all and solely rely on your subconscious, although you Could do that with enough time playing at the table. Definitely take the time to think about what you are doing before the shot and take note of what the outcome was, your subconcious take care of all the tiny details that you conciously wouldn't even notice. A good example of this, but a Big one is speed and how hard you hit the ball. I basically know where i want the cue ball to end up and my subconcious takes over from there as to how hard to hit it.
Anyway I need to quit rambling so here are the things that helped me a LOT:
-Stay down stay down stay down
-Work on your stance and your stroke: be comfortable, be smooth and steady, keep the stick as level as you can to the table(this ensures best possible contact with the cueball), and try and keep the stick as straight as possible throughout your entire stroke. Honestly just try and copy Landon Shuffet, he is the text book example. From their you can add your own flair, you don't need to be exactly like him.
-Talk to good shooters that you know: There are a gajillion intricacies to this game and an equal number of ways to handle them. The really good shooters have lots of first hand experience that can help you a Lot. Remember that you are your own person though and that something that works perfectly for someone else may not work for you. Either way the more knowledge you have the better. What i used to do is find someone that is 100x better than me and ask them to play nine ball or something for say 3-5 bucks a game but only if they will tell me what they are doing and why they are doing it. I learned a lot this way. Pool is not a cheap thing to get into, it will cost a lot of time and money to really improve, but i think of it as a hobby I can have for most of my life.
-Try new things: The best time to try stuff is when you are new. It's much harder to teach an old dog new tricks as far as pool goes. Try things out, stay down on your shot and see how it works. You will never know ever single shot but the more you do know the better.
Anyway thats all i got and I hope it helps.