Everyone has “sources” they depend on to write well. I rely heavily on the Mayo Clinic’s website (for useful health references) and Rhapsody of Fire blasted on MAX (for inspiration) to help me get started. For others, Tagcrowd or Textalyser helps keep their articles SEO-rich and focused. When I’m deep into my article, though, I’ll use Thesaurus.com and the sources listed below to flesh it out.
If you really want to improve your writing, these three sources are a must. It won’t make you a writing god, but …

Again, before you begin your query letter, there are some things you should avoid.  Here are some common mistakes writers make when compiling a query letter.
4 Common Query Mistakes to Avoid

Pitching more than one article. You shouldn’t be pitching more than one article per letter.  If you must, write a separate letter for the other topic.

Writing a query that is longer than one page. Editors skim the letter quickly to see if it interest them, and they’re not likely to read a long query.

Claiming you are the “perfect fit” for …