Hey there! Not talking about books or those sites that have rigid requirements and pay pennies after you write thousands of words for them. This would be more along the lines of blogging or vlogging but under your name and/or your true identity. Yes, it can be fun venting on sites like Yelp but this not only requires a little planning and can be a great service to consumers worldwide.
Consider What You Will Talk About
There's a lot that people will read and share but they want a consistent voice and possibly topic. For instance, you may be a big fan of Trader Joe's and vintage car restoration. Can you write about both? I don't see why not if you're willing to invest the time into creating two different entities to share your honest views.
On the other hand, it may help to ensure there's some congruency in your topics. Let's replace Traders with Whole
Paycheck Foods (or another premium grocer with a following) but you also like to shop at Dollar Tree. This makes sense to some but most likely, not the majority. If Amy Dacyczyn (author of The Tightwad Gazette series) were to share the best places to buy goose liver, she'd been laughed out of her book deal.
Plan Your Brand
Are you funny, informative, serious, or so darned detailed that it's not funny but people love you anyway? Will you need visuals or a funny theme song as your vlog/podcast intro? Like any other venture, consider what your competition is doing and see how you can make it better or different.