"The only thing I know about how to be more prolific? Write about the thing that means the most to you, then write about the thing that means more."
Late 2019 I started writing on a topic I'm passionate about- cheap entry into amateur radio. I wrote more than ever, about 12000 words. Not much by novelist standards, but more than I'd written on any single subject before it. And I have a lot more material to write, once I can find the brain power to sit down and fix it up. One of the subjects of my writing was a product that's been since discontinued (the BITX40 if anyone is wondering) and so it's stagnant- but it's all there and I have more writing to do.