Mastodon tip: You can reply to your own toots. This won't put your username in the toot, but it /will/ mark your reply as part of a conversation.
Among other things, this makes it easier for others to follow what you're saying, if you're posting multiple toots in succession; all they have to do is click one toot and it'll expand the whole conversation thread.
A quirk to be aware of:
If you reply to someone else's toot without mentioning the author, you'll also need to boost yours afterwards if you want it to be delivered to your followers.
@noelle THat's what I was trying to say with my other message. @daggertooth
@daggertooth ...huh. I did not know that; I thought they got delivered to the public timeline. Good to know!