Just relax. Just have better composure in your posts. Don't beat yourself up over the past, just try to be decent and don't get in fights.
If someone is giving you shit, ignore them and prove to them you're worth their time by making good, thought out posts.
Making rebuttals against people talking shit doesn't make you look good, but keeping good composure does.
As of EOF, if you want to post something good, make it witty and well thought out, not something poorly planned and something you're not sure people will like.