Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Long Term Memory

Long-term memory differs from Short-Term Memory [ For more on 'Short-Term Memory' go here: http://www.braingle.com/mind/25.html ] in several ways. From a practical point of view, it is mostly permanent and has an almost unlimited capacity. The recollection of childhood memories through hypnosis or other methods shows the permanence and large capacity of long-term memory. Additionally, it cannot be disrupted by things that can affect short-term memory. From a biological point of view, each type of memory has a different nerve chemistry and is affected differently by various drugs and diseases.

There are three types of long-term memory. The first is called "Procedural Memory." This is how you remember skills such as riding a bike or dialing a phone. The second type of memory is called "Semantic Memory." It helps you remember facts such as the color of your hair or your mother's name. The last type of memory is called "Episodic Memory." This kind is how you remember personal memories such as your last birthday party.

Each type of memory can benefit from different memory techniques. Most students are interested in improving and using their semantic memory. Elderly people are frequently more interested in their episodic memories and babies are very active in using their procedural memories.
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For more mind exercises: http://www.braingle.com/mind/