How to sharpen Short Term Memory is a process of self-improving. Anytime you put forth effort to make your life much easier, you are self-improving your image and life. Sharpening the memory is the process of making the mind, which processes, reproduces, and recalls everything it learns much better.
The mind works to reproduce, recall, and process information gathered, words retrieved, thoughts collected, sounds heard, noises made, and the like. The mind retains all details gathered from learning, and relates it back through mechanism of association.
To help you understand the way the mind works, we can consider a computer. The computer also has memory, which its memory has less room whereas the brain has a whole area to store the information and data it gathers. Computers will collect bits and pieces of information, store it on a hard drive and as you retrieve the data, it comes up as a whole.
Likewise, the brain does the same. It gathers bits and pieces through short-term memory and stores it in a cavity of the brain whereas you can retrieve it later by using the long-term memory. While the short-term memory gathers the information and loses it quickly, the long-term grasps hold of the memories and waits for associating mechanisms to trigger the memory so that it will display itself in images, thoughts, ideas, and the like.
Unlike computers, the brain will capture all details of a particular event and keep it forever in your mind. Computers on the other hand require that you save the information in order to retrieve it later. The brain naturally saves the memory and data it gathers, whereas the fabricated machine lacks the ability to do what the brain can do naturally. Still, some software programs will naturally save data it collects.
Sorry about that, you might not be technology literate. Maybe we can look at the brain as a nursery. Think of all the children in the room as the short-term memory. Think of the teachers as the long-term memory. The children as they play trample, stomp, and destroy the entire room in a matter of minutes, by spreading toys, crayons, color books and the like around the area. The bits and pieces represent the toys, crayons, books, and the like. As the children prepare to go home, the teachers will gather all the bits and pieces and put them back in place.
As you can see ALL INFORMATION that goes into the brain remains for life. Unless you have some illness that destroys the memory, you have everything you need to recall what it is you are trying to recall. Therefore, you merely need associating mechanisms to pull those thoughts together.
To help you understand associating mechanisms, we can consider a short story. Think of a time in your life at what time you misplaced your keys or other item if you like. What did you do to find those keys or other item? Did you back track? Did the process work? Did you associate something in the environment with your keys to help you find them? What was the object? Was it a purse? A key ring? What else did you associate with the keys to help you locate them?
As you can see objects of familiarity will help you find answers to your lost memories, while helping you sharpen the mind and short-term memory.
The short-term memory collects information, but it will only keep it for a minute. A few helpful tips for sharpen the memory can include. Instead of looking briefly at information you are seeking, stare at it a few moments longer, say it aloud, and repeat it.