To improve your memory, learn another language. A report in the journal Neurology shows that bilingual people developed dementia nearly 5 years later than those who spoke only their native tongue. And previous studies have suggested that fluency in 2 languages keeps more areas of our brain active, and can improve observation, decision-making, and multitasking. To start learning another language today, try the free app: DuoLingo. Or check out the Pimsleur Method – which offers downloadable MP3 language lessons – and you can get your first one for free at Pimsleur.com.