marketing for larger size contract

You could certainly pursue online pay-per-click ads (PPC) like Google Adwords.

You can customize them to attract "contract printing" searches in you area or state.

PPC can work for you....you can also advertise in offline media

Yeah offline can be great too. I think the best way (thought not the easiest) is to advertise in a variety of different medias and outlets.

One of the benefits of online is your ability to track your return (ROI) and tweak your ads for greater efficiency.

Try to target corporate companies, sponsors and decision makers. Send out flyers in newspapers or direct mailings for the residentials also.

Do everything you can to get the company name out there.

Also customer service is impeccable. Word of mouth can really hurt you or help you tremendously, especially if you are just starting to get your name out there.