Thank you for posing this question, here. Having written quite a diverse medley of printed written material myself, I think I can be of help to you! I find that most writers need to expand their reading material and look for authors whose work they are drawn to.
Most people that I've corresponded with, do their best work when they are inspired by someone whose work they admire. Start with the classics and see what does it for you. I always believe in the "teaching by example" technique. By that I mean I prefer to read the work of a teacher/ writer who has already written the way that they are trying to teach me.
If they show me that they can do it themselves, then I know that their own writing credibility is genuine. Now I know that you're probably asking yourself, Who is this person and wondering if he knows were of he speaks! If you are then you are both a wise and cautious individual, my friend.
So to be fair and in my own defense, thecoffeewriter, let me now direct you to a site called "The Professor's Write Site!" which can be found at the following URL http://www.theprofessorswritesite.blogspot.com
It's a Blogger blog site that I created for writers just like you, who want to improve their skills. There is no cost to use the site, nor are there any newsletters to sign up for.
What there is there however are articles, how to's, tips, writers resources and a few good writers who help those who choose to visit the site overcome the many stumbling blocks that all writers face.
You are welcome to check it out as other well known Hubbers like Epigramman, Lady Wordsmith, and saddlerider1 just to name a few. Angel aka the Philosopher who writes on HubPages as A.CreativeThinker has contributed many fine pieces that our visitors have found extremely helpful.
All these and some other Hubbers liked it so much they became members. There is only one thing that it will cost you and that is your time to visit it. Other than that, please be my guest! This is my personal invitation to you, thecoffeewriter!
Regards Mike (Aka Professor M) ;D