Nothing is more inspirational than a deadline. These websites update their competition/submissions information every month, so that YOU can choose one (or three) in any genre and GET IT DONE! Yes, there is usually a fee (sometimes quite hefty) but, without the pressure of that deadline, when else would you make the effort to rewrite, cut and polish a piece of work until it's as good as it can be? Trust me ~ the whoosh of pride and satisfaction you get when you press that 'Submit' button (two minutes before the official deadline, of course) makes you feel like a winner ~ every time.
Here's SOME WINNING ADVICE from a short story competition judge
... and a few TIPS FOR POETS
But don't let any of it stop you from daring to be different and doing your own thing.
However, it's always a good idea to read the rules.
And you might find TLC's excellent guide on
HOW TO WRITE A SYNOPSIS useful.