I think a lot of people enjoy this site not only because they can practice the language they are learning, but also because they can meet people from all around the world. I really enjoy reading and correcting notebook entries that tell me a little about the author's country and culture. You could write about a special holiday or celebration, a famous artist or musician you like, or a national food (maybe even share the recipe in English), or talk about what daily life is like. If you have ever traveled outside Brazil you could talk about what was the most unusual or different about the place you went and why it is so different from what you are used to. You can also just tell a story about something funny or interesting that has happened to you. Hope those suggestions are helpful!