Great tips! I think it's really important to write about whatever you want. There shouldn't be a focus on a specific topic that you might not know anything about but it's popular. If you're not writing about the things you enjoy writing, people will be able to see that, because it won't look very natural. And there's always the option to post some photos and videos like you've said. I really like steemit, because you don't need to write about anything specific. One day you can write about your cat and another day you can write about cryptocurrency (just an example). I think that's the most beautiful thing about steemit. You choose what you want to post!