I've been trying to do this the last week or so. I've only been here a couple months, but I actually have fun scrolling down the NEW category and looking for something interesting. Possibly resteeming it.
I'm trying to gain a foothold here, and I realize that it takes time. Your point about not upvoting the posts that are already getting huge rewards is very valid. I'm going to start doing that. If I vote on a post that is already earning over 1000 dollars, my vote is pretty minimal.
But a 100 percent vote on a relatively unknown post is much more effective. Great info!