Writing copy has never been easier.

 https://headlime.com/

Commercial site that uses GPT3 AI to write copy. 

Copywriting: The Definitive Guide

 https://backlinko.com/copywriting-guide

This is a complete guide to copywriting in 2021. From the backlinko folks. 

SEO Copywriting: The Definitive Guide

 https://backlinko.com/seo-copywriting

from the backlinko folks

How to Write Anything

https://forge.medium.com/how-to-write-anything-ad2a62c122f6
Meta-post with links to advice articles on different types of writing.

AI-based writing assistant for any purpose

https://linguix.com/
Freemium AI-driven replacement for grammarly?

Writing copy for landing pages

https://stripe.com/atlas/guides/landing-page-copy
I'm not sure I buy all the hype of landing pages, but here's a pretty good guide.

The 4 Best Ways to Earn Income Writing in 2018 (and the 3 Worst)

https://medium.com/the-mission/the-4-best-ways-to-earn-income-writing-in-2018-and-the-3-worst-16b486c19774
Good advise on the business of writing.

5 Things Only Serious Writers Do

https://www.copyblogger.com/serious-writers/
#1: write

7 little-known niches that could make you a boatload of money

https://medium.com/swlh/7-little-known-niches-that-could-make-you-a-boatload-of-money-ad910d3d0726
Well, maybe not a boatload, but these could be a side hustle. 

Dear Writer,

https://medium.com/personal-growth/dear-writer-773ebd74cdfb
Is the whole "content-marketing" thing taking writing in the wrong direction?

How I Gained 103,886 Email Subscribers With Just One Article

https://medium.com/personal-growth/how-i-gained-104-000-subscribers-through-the-most-recommended-article-in-history-of-medium-2855e335e02d#.c9ai11c4n
Interesting piece on the complete cycle of gaining new email subscribers. 

9 Tools That Will Help You Become a Better Writer

https://medium.com/product-hunt/9-tools-that-will-help-you-become-a-better-writer-2feff4affd3a#.mwfvg1tx2
I'm a bit skeptical that tools make for a better writer, for power tools don't make for a better woodworker. 

15 Ways to Win at Writing Email

https://medium.com/mailchimp-for-agencies/15-ways-to-win-at-writing-email-af42903837c6#.7a7wrxk6x
Some more good hints at writing marketing emails from the CopyHackers folks via Mailchimp.

CopyHackers: copywriting for startups and marketers

https://copyhackers.com/
Copywriting resources, courses and pros.

Why Copy Matters (Like, A Lot)

https://medium.com/mailchimp-for-agencies/why-copy-matters-like-a-lot-c36a9499a459#.60fspdpa7
Why copy still matters, especially as regards email marketing. CopyHackers via MailChimp

What makes an article popular on Medium? We analyzed 10,000+ data points to find out

https://medium.com/the-mission/after-10-000-data-points-we-figured-out-how-to-write-a-perfect-medium-post-58c41c314f6a#.1k9p0yrux
Analysis of 10k Medium articles to see what makes a popular post. Not sure about causality, though. 

How to Become a Prolific Writer By Blogging Every Day

https://betterhumans.coach.me/how-to-become-a-prolific-writer-by-blogging-every-day-7c22d4f483a9#.n8e4ga6fi
The key to #blogging? Do it EveryDay. That, and a snappy title. 

The Two Minutes It Takes To Read This Will Improve Your Writing Forever

https://medium.com/an-idea-for-you/the-two-minutes-it-takes-to-read-this-will-improve-your-writing-forever-82a7d01441d1#.wpswath90
Great 2-minute read on how to improve your #writing.

My 4 Favorite Writing Tools

http://www.colliermarketing.com/4-favorite-writing-tools/
4 writing tools from somebody who writes a lot. Some free, some not:

Surprising lessons from BuzzFeed’s most popular content

http://marketingland.com/surprising-lessons-buzzfeeds-popular-content-177572/

Interesting take-aways from analysis of buzzfeed's most popular #content. Make it useful, unusual, or emotional.