"Think about cadence, about the natural rhythm of your words. Read your short short fiction aloud. It should flow effortlessly. It should sound pretty. If it doesn’t, ask yourself why."
That's from a nifty essay on writing very short fiction (VSF) by Roxane Gay.
About reading aloud: sometimes I do, sometimes I don't. There's no real method for me. Some stories feel like they need to be read out loud. (I used to read my stories to my cat, but he seemed a little bored.)
I haven't been doing it lately, but that's mostly because my writing has been minimal as of late.
Reading aloud can be very helpful for the reasons cited by Roxane. But on the other hand, I also worry about becoming too enamored with the way the words sound and somehow losing focus -- if that makes sense.
By the way, there are lots of other great essays at VIPs on vsf, a blog put together by Laura Ellen Scott.