I'm in my 50s, and my brain fog scares me. Now I'm doing everything I can to give my memory a boost.

The author said she started performing stand-up comedy to help her brain stay sharp. Courtesy of Holly Rizzuto Palker My memory isn't what it used to be, and I've started to worry about my cognitive function as I age. I've started saying '"yes" to a lot of things, hoping staying active will keep my brain sharp. These days, I do stand-up comedy, take drum lessons, and attend tap classes. "I forgot your sister asleep in the car," I shouted to my 6-year-old son as I bolted from the tennis cou...