Cold call, cold email. BUT... if you do cold email or cold call people, PLEASE, for the love of (God|Satan|Allah|Dionysus|Zeus|Zoroaster|FSM|$WHATEVER) don't send a generic, non-specific pitch which is all about your company, your services, and what you can do. Send something that's about the frickin' customer. Research the people you contact
before contacting them, and make your pitch about
their needs, and
their problems. Focus on the customer first and foremost, and only briefly mention what you do, and solicit permission to advance to a deeper relationship.
Getting untargeted, generic spam is just annoying as hell. Don't be that guy.