Circulation:

• Upvote posts that you think will become popular before anyone else
• Upvote only 20 times per 24 hours (after those votes your profits become exponentially less)
• Comment things that add substance to the post not just a "Keep up the good work!"
  

Posting:

Only post 4 stories per 24 hours, afterwards those 4 the rest will be taxed by the blockchain. if you attract the attention of people with lots of steempower to upvote your post you will make more money (More steem power= more that your upvote is worth)

Tools:

•  http://www.steemd.com (Check your voting power)
•  http://www.steemdollar.com/dollar_per_vote.php (check your dollar per vote)
• http://www.Steemdollar.com (Check the value of steem dollar )
  

More in depth explanation (video by  George Donnelly Published on 23 Aug 2016)