I look forward to lurking about this topic.
Storytelling has always been my passion, and I love discussing the craft. I practice mainly at being a novelist, and much of my focus is on longer stories and large character arcs. My general tips for such are thus:
1. Have an outline.
A general idea, or a vague notion will result in written work being stymied a few thousand words in. Know what interactions will happen, and more importantly why they will happen. Have a firm goal and ending.
2. Be flexible.
When writing, your will find that some of your goals will be subverted by the needs of the text. This is not an easy phenomenon to explain, but when writing your characters will oftentimes take on lives on their own. Work that into your previous outline to make it stronger, and be willing to destroy and create new scenes as demanded.
3. Don't worry about the details.
At least, not during the rough draft. The rough draft is the skeleton of a story. When writing, worrying about small details you may have missed, imperfections in the text, or even spelling errors can bog your writing down, and kill creative flow. Ignore all that. Just write. And do not look back. I personally refuse to read any rough draft for a week after I wrote it. Even then, I usually only re-read it to get the feel of where I left off, if I have not touched it for a while. By following this method I get excited about the idea of the first revision. The more I write in the rough, the more I know I can improve, and make the entire thing better. No writer ever wrote a perfect story during the rough draft. It's called 'rough' for a reason. It's supposed to be mostly rubbish.
4. On the revision, be brutally honest.
When you do revise, that is when you should pay attention to details. But it is should be not a condemnation. It was a rough draft, the skeleton, the foundation. The revision is to build upon it. Take the best parts of the rough, and make them better. Remove the worst, and replace with something better. By doing that, revision becomes not a chore, but an exciting task. It is not an exercise in 'You are a bad writer, now fix this to be a writer,' but rather, 'You are a writer, and fixing this will make you a great writer.'
And there we go! I'm done pretending I'm wise and know stuff, and will shut up to join in on more regular discussion with details and all that. Us writers tend to be a neurotic and navel-gazing folk, so I have indulged in my own for now, and look forward to future discourse and discussion.