[rayalez]

Theoretically google does penalize duplicate content, but I've heard that you can ask medium support to set a canonical link pointing from the medium article to your site, I think that might even benefit your SEO. Although I've never bothered to do it yet, SEO is not my main strategy.

Either way, for me, the benefits of anything that makes content creation easier way outweigh the possible SEO penalty, so I don't really care.

I don't see the point of writing teaser stories on medium, I doubt they'll get accepted into big publications, or bring you a lot of traffic. For me, Medium articles are meant to close email subscribers, and the future emails I send can direct people to my site.

I've got started on twitter only recently, I post there for fun, writing practice, and sometimes I just share links to whatever project or post I want to promote.

Posts submitted to subreddits link to my main site.

I don't usually bother to manually promote medium posts anywhere other than submitting them to publications (because I might as well promote the main site).