Hard things first
You have to do the hard things first. Twitter and Facebook are easy. The new website is easy. The brochures and business cards are easy. Get out there and sell, cold call, build your pipeline, if your product is not ready yet then you have a head start to get out there and build interest and anticipation of your product.
If you cannot generate interest without business cards and brochures then its highly unlikely that you will when you do have them. It is a huge boost when you talk to someone about your upcoming software or hardware product and they are as excited as you, and asking “when can I have it”.