I don't know what can I do! haha

Well, I have finished my studies at the university, and now I'm preparing all the papers for my graduation.but...  Meanwhile, I'm trying to look for a good company to start my professional career. :D I don't know how I should contact the people of the companies haha. I really want to go personally to their offices, but also I also want to contact them by email... Anyway, I'll try to find the best way to make my dreams a reality haha.