In case you haven’t noticed (but how could you not?), it’s Halloween time! One central theme of my happiness project is memory. Time is passing so quickly; I worry that I won’t remember this stage of life, or what it’s like to have children this age. My shorthand aphorism for this worry is “The days are long, but the years are short” (of everything I’ve ever written, my one-minute video, “The Years Are Short,” is the thing that resonates most with people). One way to make time…