If you don't feel like posting on Steemit you can also earn passive income by delegation, it means you can lend your steem-power to the voting bots, which you can track on http://isteemd.com/
This new service trucks the trusted delegation services that are offered on steemit.
the site is simple and self-explanatory
How much you should expect in return if you have a 1000 steem-power you should get around $20-$25 sbd a month
This is as good as it gets the steem coin and steem dollars are not so stable in price but as of now the price is affordable
My self-deligated some to smartsteem https://smartsteem.com?r=bitswami