On twitter many people are on the top, many weblogs with specific article.
If you know a person who you see at restaurant you can tweet him but if you want to be in twitter for business you can improve this way by finding keywords and use them in a specific area.
The most important question is what are you doing?
For finding a keyword choose a website and copy its article add something and then go to answering what are you doing question add something at the beginning of it and press enter. Now search again and see what happened.