I realize that not everyone can afford to buy Steem, but that would be my first advice - buy some Steem and power it up. These prices right now are a bargain in my opinion.

If that isn't an option, and you are uploading pictures and writing posts from a cell phone, I use the Partiko app. There is a built in preview feature so you can see your post before you publish.

As a bonus, you will also earn Partiko points that you can also convert to Steem.