If you do you will probably just end up copying and pasting popular posts, in desperation of getting that one big post that will get you money.
The way i see it, just write posts about things that interest you, chances are there will be people that will read and vote on your post as they have the exact same interest.
That is how i'm going to go about it, maybe write a few posts a day, but mainly read other's posts.
And if you do make a substantial amount of money out of posting on Steemit, then see it as a great bonus, not as a means to an end.