I am asked quite often how I am able to make so many posts. It seems that many people are struggling with the idea of posting because they are concerned about quality, audience, grammar, marketing and a bunch of other things that simply make the whole task appear overwhelming. My strategy is quite simple. Begin with typing. Heck, try typing "idea" 100 times if everything fails and eventually a topic will pop up out of thin air.
Most people feel the need to be inspired or believe that their content has to be perfect in order to be published. If you have this mindset then posting will become a chore. At one point you are guaranteed to stop doing it altogether. Instead, try to just type whatever comes to mind. Don't pay too much attention to your grammar or content. Rather treat your ideas like scribbles on a diary and everything will come together by itself. You will also find out that you are going to become better and better at putting your ideas together. Your brain will do most of the work without you even realising it.
There is an infinite amount of topics to chose from. If you ever run short then try to visit other people's posts and publish your comments as posts. If you find facebook pissing you off, then browse through your home page and post your reactions here. Humans are reactionary beings. We find it easier to counter someone else's idea rather than come up with something of our own. This is how and why evolution is such a successful mechanism.
At the end, the best way to make the best out from your posts it to write as if you are the only one reading. Don't mind your audience. You are the author and the audience.