I think the best way to make Steem right now is through Utopian.  Just find some open source software on GitHub and find bugs, report them in the Issues section of the Repository and then write a Utopian post describing it.  If I'm focused I can find and write 5 bugs in 1-2 hours, and they can make anywhere between $10 and $50 each.  

If you're going the content creation route, I'd say writing posts with lots of pictures in them is the way to go.  It seems to be what people on Steem like.  Videos are time consuming to curate, so most of the money comes from random DTube votes, which you can't count on.

Commenting is a good way to get more followers, which is a longer term strategy to boost your overall income for all your posts.  I don't think Resteeming grants the Resteemer any benefit at all except that you'll make a little more as a curator because more people see the post after you've Upvoted it.

I currently still use DTube because it really is decentralized, while DLive is not.  I may switch in the future because I feel like DTube failed us when it comes to longterm video storage, but I won't use both at the same time unless it becomes possible to not display both versions on my Steem feed.  I don't like having redundant posts.