Here's what you do :
Figure out what boards you like, based on what you know about the subject matter, and if you don't know anything about say, /pol/ cut it out and don't post there. post on the boards you know about and can contribute to. even if you can't post art you made on /i/, you can still talk about it, or anything else creative.
Next ask yourself "what do i know?" and "what can i do?"
If you've had a long history on a regular pornsite, don't be afraid to discuss it! bring up any threads you've posted on, tell stories, repost cool threads or links, that type of stuff.
Anything you've done or experienced, childhood stories or new stuff. discuss vidya you've played in the past or recently (the same goes with mango, comics, animu and such)
Read all the existing threads on the boards you like, and trudge through the archives.
Go through all the posts in livechan, discuss the content posted in there, (and you can also discuss thread ideas there). if you have ideas, suggestions or found bugs, bring it up in /sg/.
Check out the clock, twoot's site, twoot's blog, read the faqs, and understand the rules. Don't report posts for reasons unrelated to the rules, don't tell other people that you reported them. if you have to elaborate, then do so, but accusimg people never works unless you have exact proof. for instance, this guy wanted us to raid yourworldoftext, but he didnt say it. he just posted the link in several threads and made 3 or 4 threads begging for people to "check it out" and if you went to the site, it was getting raided
so i explained the situation and the guy got b&. but you can also contact the mods via email, livechan and if all else fails discuck. also if there's an absolute shid thread, it goes on trash. make a list of all the treads you want to post on, and post on them one by one.
And if you want to keep 22chan comfy, it starts with you, don't act like a faggot unless for whatever justified reason you have to.
Anyway, at least that's what i do, and it helps me to brainstorm so i figured it might help you too. good luck fren.