Another thing that new users may not realize is that your Mastodon account isn't limited to following other Mastodon accounts. Mastodon uses a common open source protocol called ActivityPub, and can interact with other services that use that same protocol. Pleroma, for example, or PeerTube, or PixelFed. It's like being able to subscribe to Instagram or YouTube from your Twitter account.
Another tip: Every Mastodon account has RSS built in. Just add .rss to the end of the URL for your account, e.g. firstname.lastname@example.org
That lets people follow your public posts from an RSS reader, but it's also useful if you wanted to use IFTTT to crosspost your public posts to another platform.
curl -H 'Accept: application/activity+json' 'https ://mastodon.xyz/users/yetzt' (remove the space after the scheme, couldn't figure out how to make Mastodon not turn it into link …)
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko