I will use what I was posting about 10 mins ago as an example. I was posting a reply on the LoL general discussion thread (Here) about how my RL friend refuses to 1v1 be. I was going to ask ways to convince him to play against me even though his number is higher than mine (thats all it is), but then I thought to myself.
What the fuck am i posting this for?
I discarded the post and continued to browse TL and the other sections.
I have learned mostly from experience and seeing closed threads what is ok and what is not ok to say. I know not to post to bitch/complain about something i find unfair, and I know not to post things that are completely irrelevant to the topic. This is probably why my post quality has (mostly) improved over the past 750ish posts.
..I just had one of those moments, thinking to myself why am i posting this? I probably shouldn't post this, but after thinking for a few more seconds, I want people to see it is possible to improve your posting by simply asking yourself "Why am i posting this?". If you can't think of a good answer to that question, discard and move on.