Jax Daily How to Run a Facebook Post Test in 2019. The best posts to try on facebook: live stream on facebook, post video directly to facebook, images without links, selfies, statements and quotes, funny memes, questions, polls, and trending or popular videos shared on facebook. Look at trending posts on facebook for possible topics of conversation that could improve your engagement. This does require some trial and errors and make sure that your choice of topic aligns with your brand and page content.