Read, read, read. Read well-written books and magazines, and pay attention to their vocabulary, use of language, grammatical construction, and style. Get a notebook and record your responses and the ideas they trigger, and copy out (by hand) sentences that you admire or want to remember. And practice. Practice writing, not in a blog but in a private notebook or electronic journal. Don’t start by publishing (posting publicly) everything you write—you don’t need an audience for your practice, any more than you want a band to go onstage without a rehearsal. A writing course could help if it’s more about clarity and correctness of composition and less about creativity and freedom. Learn the rules and structures first. You can break them later. When you break conventions, you should know when you’re doing it and why. If a quick way is what you want, I don’t know that you’ll find it, any more than there is a quick way to lose 120 pounds or become a champion skater. It’ll take a bit of time and effort, if you’ve already passed up your chance to do this in school, but it does pay off. Your writing, in some form, is apt to be your first contact with a prospective employer. It’s very nice to know you can come across sounding knowledgeable and intelligent instead of having your mistakes leap off the page ahead of your appearance in person.