Talk to anyone over a certain age and they will joke about senior moments - lapses in memory.
Underlying the humor is a fear of developing Alzheimer's disease or senile dementia.
Their concern isn't unfounded, because nearly 5 percent of people aged 65 and older (and a much larger proportion over 80) do get Alzheimer's.
However, there is mounting evidence that memory lapses don't necessarily foreshadow dementia, and that doing mind aerobics can reduce the risk.
1. Exercise regularly: Studies have shown that aerobic fitness may reduce the loss of brain tissue common in aging.
2. Stick to a healthy diet: Avoid sugar and saturated fat.
And eat lots of antioxidant-rich fruits and vegetables such as blueberries, spinach and beets.
The magnesium found in dark green, leafy vegetables appears to help maintain memory.
3. Learn new things: Mastering activities you've never done before, such as playing the piano or learning a foreign language, stimulates neuron activity.
4. Get enough sleep: Too little sleep impairs concentration.
5. Devise memory strategies: Make notes or underline key passages to help you remember what you've read.
Invent mnemonics formulas to help you remember things.
6. Socialize: Conversation, especially positive, meaningful interaction, helps maintain brain function.
7. Get organized: Designate a place for important items such as keys and checkbooks.
Keep checklists for things such as daily medications or items to pack when you travel.
8. Turn off the tube: Experts say too much TV watching weakens brain power.
9. Jot down new information: Writing helps transfer items from short to long-term memory.
10. Solve brainteasers: Crossword puzzles, card games and board games such as Scrabble improve your memory.