[nondeveloper]

If you benefit from reading books I recommend The Elements of Style by Strunk and Howe and On Writing Well by William Zinsser.

For blog writing I recommend making a practice of bookmarking posts you like and asking yourself why you like them or why they work. I will point out that blogs permit a flexibility of style and content that few writing forms have ever had. This is a double-edged sword, truly.

I’m going through a similar process so I definitely recognize the challenge you’re having. Good luck!

Edit: I just remembered bookmarking Paul Graham’s excellent “How to Write Usefully” the other day. It might be helpful to you: http://paulgraham.com/useful.html