The people over at the Brain Fitness Channel have developed a test to see how well you are able to use your short term memory. They show you 15 words in 15 seconds. Your job is to look at the words, and once the list is completed you need to write down all the words you remember.
The average 20 year old will remember 8 of the 15 words, and the average 80 year old will remember 4. Give it a try. I scored a respectable 10 out of 15.
Test Your Memory
Link found via Lifehacker.