I haven't been blogging much lately, but I have a very good reason: every topic I seem to think to blog about has been more suited to be written as an article or essay to pitch to a magazine.
I wrote on a similar subject a few years ago for the Los Angeles Review's blog.
Don't let your social media posts trump your true potential as a writer! If a thought occurs to you, don't just rush to Tweet it. Can it be developed into a poem? an essay? a short story? a novel? Don't waste your ideas on a fleeting, ephemeral status update.
Or, worse yet, don't give away that idea to someone who may take it to the necessary next step and leave you with nothing but 140-characters in the Twitter firehose.