I don't know where this belongs but...

If you stay at home, how do you keep your brain sharp? I have been a SAHM for a year now but for a year and a half before that, I was a SAHW. I wish I was joking when I say this, but I feel like I am losing some of my brain power. What activities can I do to keep my brain going? I want to retain some knowledge for when it is time to start helping my kiddos with their homework!