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You may think you're too young to worry about keeping your brain sharp. Yet the lifestyle choices you make now can greatly impact your brain as it ages. "Making the right choices in your 30s, 40s and 50s will help protect against memory loss associated with normal aging and reduce your risk of getting age-related brain diseases like Alzheimer's," says Gary Arendash, PhD, research professor at the Florida Alzheimer's Disease Research Center in Tampa. Here are 10 changes you can make right away.

1. Become a World Traveler

You might think of travel as a self-indulgent pleasure, but it can actually reduce your dementia risk. "Exposing your brain to complex and novel environments helps it become healthier," says Paul D. Nussbaum, PhD, clinical neuropsychologist and adjunct associate professor of neurological surgery at the University of Pittsburgh School of Medicine. Reading, writing, playing board games and learning a new language are also good for challenging and stimulating your brain.

2. Plan a Girls’ Night

No need to feel guilty about sneaking off to spend time with your friends. As it turns out, building emotional connections with others can help stave off dementia, says Dr. Nussbaum.

3. Nosh on Unsalted Nuts

Your brain is made up of 60 percent fat, so you need to eat some to keep it functioning well. But remember that not all fats are created equal. To give your brain the most help, eat healthy fats like those you’ll find in nuts. (Stay away from salted nuts because they can raise blood pressure, which is bad for your brain.) Fatty fish like salmon, mackerel, herring, tuna and sardines are also great sources of healthy fats. Aim for two to three servings per week.

4. Have a Cocktail

Although research swings back and forth on this one, the most recent studies indicate that moderate alcohol intake could benefit your brain. Note the word moderate, however. That means one to two drinks a day (and if you don’t currently consume alcohol, don’t start), says Dr. Arendash.

5. Get Colorful

Antioxidants, which are found in fruits and vegetables, help rid the body of disease-causing free radicals. That's why Dr. Nussbaum suggests filling the majority of your plate at each meal with fruits and vegetables, aiming for as much variation in color as possible. Although all fruits and vegetables contain antioxidants, berries in particular have been shown to have a positive effect on cognition and brain health.