to find someone else's topics, click their nickname in their forum post. This opens their profile, which contains "Messages" and "Topics" links. Use them to find their messages and topics, respectively.
As for your own profile, it's a bit tricky because clicking your name opens your account page. However, if you log out, this opens your profile, just save the link and then use it to view your profile even when you are logged in.
Actually, you do not even have to log out because I can give you this link:
