This is largely what I already do (keep a pseudonymous public blog) but as I said, my self-consciousness about posting material there has increased over time. I have 'daily life' posts on it from years back that would make me cringe hard if I were to go and look at them.

Come to think of it, my self-consciousness is strongly correlated with the number of people that I'm not close friends with who follow my blog. So starting a new secondary blog would remove that barrier. Alright, I'm going to commit to trying to keep a primary and secondary blog for at least a month, and see how it goes.