Don’t put emojis. People here hate them and will give you a hard time. You can occasionally use them ironically.
If you choose to answer an AskReddit question, upvote it, too.
Don’t be a jerk
Never title posts things along the lines of “I know this will get buried in new, but”. It’s damn annoying and no one cares.
People who claim to be experts on a topic can be wrong. Do your research and please read articles fully, not just the headline.
You can be wrong too. Don’t be afraid to admit this and change your mindset.