Twitter Training

With regard to using Twitter to start creating an internet presence for marketing should you use your name or a username? If I have different products I am presuming I need to create different ID's. Should I use the same username in Facebook, Youtube, etc to keep it all consistent.

Username can be different ya! It can be a cool wacky username. Besides, the name you've been using on FB, YouTube, etc. may not be available on Twitter. So it's best to keep a different username.
Have fun!