I’ve mostly been posting to Twitter through my RSS feed for quite some time. Given that the future of Twitter is uncertain, please subscribe with an RSS reader. I would recommend Feedly, The Old Reader, or Inoreader.
I have also made a Mastodon account: @firstname.lastname@example.org. It will likely republish my RSS feed someday. Mastodon is interesting and I’ve been aware of it for years, but it never seemed like it would become a serious contender. It seems that may change.