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Using rhyming and even melodies can help you remember facts. By incorporating rhythm or the tune of a simple song into your memorization you can also help your understanding of how key events, people, dates, etc. fit together. The old saying "In 1492, Columbus sailed the ocean blue," is a great example of how rhyming can help commit information to your long-term memory. By taking the first letter of a series of related key words and using to invent a silly and memorable phrase, you can recall things in a specific order. This can be especially useful when trying to remember things in the order in which they happened. For example, "Gill Underestimated Cliff's Strength" is a mnemonic for remembering who the main Allied powers were during World War II: Great Britain, the United States, China and the Soviet Union. If you study while smelling a certain notable scent (like rosemary, for example), and then use that scent later when you need to recall the material, studies suggest you'll have a greater recall ability. Similarly, studying while listening to calm music can help you recall the material again later. When trying to commit a fact to memory, try to associate it with an image in your head. It may even help to draw the image out if you are a really visual learner. The image doesn't necessarily have to be direct in its meaning. For example, if trying to learn facts about the Boston Tea Party, you might picture a Red Sox mug filled with hot tea. Associate different historical facts, events or phrases with a different part of your home in the order that you would normally walk through it. For example, to remember the outbreak of World War I associate the assassination of Archduke Franz Ferdinand and Sophie the Duchess of Hohenberg on June 28, 1914 with your front door. Visualize your entryway to your house in relationship to the fact that Austria-Hungary blamed Serbia for the killings and declared war on July 28, 1914. An ancient memorization technique, the loci method has you construct a "memory palace" using a building you know well (like your home). If trying to remember a chain of historical events, you might associate the first event with the front door to your home, the second with the entryway, the third with your living room, etc.
Put the information in a rhyme. Make up a mnemonic device. Use your other senses to trigger your memory. Use visualization. Use the loci method.