Recently famous social networking cateogaries includes Twitter which is a best place for trending some new topics that a certain organisation or a group of people wish to do so.
You can even share your thoughts and comments with celebrities by following them on your personal accounts. If you want particular product or some names to be popular, you along with some group of other twitter friends can make it go on for trending by just including # on before the name you wanted.
For example, if u want to make mouthshut in trending you could just share your thoughts about mouthshut and post it as #mouthshut.
This is very easy to use and it has a variety of options to connect with other people around the world.