Pick a song from this list and recite it out loud. Now, recite it again but skip every other word. Then skip every third word, and so on, until you can't do it any more. This exercise helps with your concentration and mental endurance.
1. Mary Had a Little Lamb
2. Twinkle Twinkle Little Star
3. The Alphabet Song
An example of skipping by two: Mary a lamb fleece white snow...
Have you ever remembered a phone number by visualizing the pattern of telephone button pushes or by using a little math (416-2550: 4 squared is 16, 25 doubled is 50)? If so, then you have already used patterns to help you remember a fact.
Looking for patterns in dates, phone numbers, addresses, etc. will give you a much better chance at remembering the information later. This is because you've instantly made the information more meaningful, you've concentrated on it long enough to push it into long-term memory, and you've chunked it.
In the above example, you only need to remember "4 squared, 25 doubled" which is, at 4 chunks, much easier to remember than the original 7 chunks.