For me, it's difficult to find topics to write about. WriterZen takes care of that with their nifty-cool "Topic Discovery". Love the way I can navigate, select, download enough topics to last me for a few months of writing. Puts me in a ZEN state of mind.
And it's a breeze to work through the different tools to gather the keywords, topics that will help make my posts rank. There's some very thorough training that I spent some time on before diving into the tool that helped me use the tools more effectively.
No more fustrations, just a ZEN-like flow from finding topics to writing and publishing. Nice!