Lets say you wanted to post something about burning a disc. Go to the toolbar at the top of the screen and select "Forums". Then scroll down until you reach the section about burning Wii discs and select it. Once in that section, scroll down a little and you will see a blue button on the left that says "New Thread", select that button and bam, you can make a new thread. Be careful though, don't post in the wrong place or else.