Business cards - you need them. Period.
Vistaprint offers a very economical solution to those who want cards but aren't ready to commit to a large order... So economical that it's FREE! They offer a variety of other printing options. I have used their low-cost cards before and they were just what I needed - fast turnaround time and extremely affordable.
Now, when you need something a little nicer in larger quantity such as a 5000 piece postcard order, Overnight Prints was our tried and true savior. Their pricing was unbeatable and the gleaming colors and high glossy coating consistently generated positive feedback from our clients.
Lastly, when establishing a business, especially in this era, one must have an internet presence. For that, we have always relied on Lunarpages. Their customer support has been top-notch and their pricing is hard to believe for such good service.