I rely heavily on writing stuff down.

I have found that Kanban and the GTD method have helped me keep track of stuff.

I do find that my low working memory makes me more empathetic as a UX designer to people facing complicated user interfaces. And it forces me to thinking more abstractly, because the only way I can keep stuff in my head is through chunking it down into more bite sized parts, and being really rigorous about simplicity and parsimony.