I dont know if these things are posted before, because i really dont want to sit and look at the whole forum. Thats why i suggeste a search function. My idea is that you have a little box where you can type the name of the topic, like if someone posted a topic about the ps2 game "Canis Canem edit" people can just search that title so they dont make a new topic aboyt "CanisCanemEdit" for ps2.
Another idea is the "View preview" function. It works this way. You are about to write the post and you dont if you typed the html codes right or the picture you want to post isnt aviable. Then there should be a "Show preview" button right beside the "Submit" button so people can see if there post is completed. If not, they could just edit it.