• Paragraphs. Use them. 3-5 sentences, then start a new paragraph. The human eye gets lost when you're staring at a 1000 word block of writing.
• Commas. Use them, BUT! Read the sentence after you write it. If you can swap the comma for a full stop and a capital letter, do that. It's just better storytelling.
• Conversations can be tricky, but they're simple when you get the basics. "Quotation marks" are mandatory. Conversations are considered a new sentence and require a capital to start. Punctuation goes inside the quotation marks. Example, "Holy fucking shit!" or "Damn dat's a fine ass," he said.
• EVERY NEW SPEAKER NEEDS A NEW LINE.

Words from the previous paragraph leading up to character interaction.

"Damn dat's a fine ass," he said.

"Thanks!" She winked.

Words continuing story after character interaction.

​

• He said, she said. Both work but after the 12th time you've read it in a row, it gets old. Keep it simple, but mix it up!

He watched the sway of her hips as she stalked past, "Damn dat's a fine ass!"

"Thanks!" She winked, giving a little wave.

​

• Details! Nobody gives a shit what a woman's proportions are. If you're writing dress sizes, you're catering to the worlds narrowest demographic, while excluding the majority of others. For every person who thinks it's a nice touch, there's one who doesn't care and at least one (probably closer to a dozen) more who have just stopped reading while putting your story on twitter to tear it and you to shreds. Don't do it, don't waste your time, don't expend the effort. The ONLY time this is needed is commissions and the person paying you for a private story has specified as such. And I sincerely hope anyone looking for commissions knows this already.
  But! What details you do use, from hair and eye colour, a particular way the character smirks before they speak, or even something as simple as tense and whether it's first, second or third person. If you put a detail in, write it down somewhere so you don't forget. Getting 50k words into a story and realising at some point the MC's eyes went from blue to green and you've no idea how long their hair is, can be a pain in the ass.
• Don't think of your characters as characters. Think of them as people. Put yourself in their shoes. If you've written a conversation, say the lines out loud. If it sounds weird, it probably reads weird too. That's fine if you're applying a particular style, but otherwise, ask yourself what YOU would say in that situation and work from there.
• Lastly, write what YOU want to write. If that's sci-fi cuckold with lesbian slime monsters, fucking do it. If that's a sweet love story between reunited childhood best friends, FUCKING DO IT! Everyone starts somewhere. Everyone has a learning curve. Everyone looks back on the first thing they wrote and thinks, "What the fuck was I thinking?"
  The answer to that question, is if you're still doing this long enough to ask yourself the question. Then you're living your answer...