Writing is sort of like dancing. You have to strike a pose, believe in your abilities, practice-practice-practice even when you want to shuffle-slide away. Persistence is what it takes to succeed.
Take a moment to write down your thoughts or about something that happened in your day. Set it aside if you don't have time to write or journal about it. Come back to it, and perhaps an essay or an article will evolve.
Believe you can, and you will!
Get out there and pirouette, take a bow, do your thing with an air of confidence.
If you don't believe in yourself, no one else will.