HI Kosmo,
Congrats on achieving ISO registration!!! As others have pointed out, ISO registration is not, of and by itself, a "stand-out" factor anymore and thier advice on marketing is spot-on.
However, I would suggest that a very busy market, even in these slow times, is the defense industry. Being ISO registered is part of the "entry ticket" which is required to bid on DoD work (you must also have a GSA schedule). A great place to seek out this work is "Govt. Biz Ops", a website that lists all of the contract that are coming up for bid, as well as, the winners of the bids. If you review the winners, their quals and capabilities, you will quickly learn what it will take to be competitive.
Many contracts are now requiring the bidders to be using "Lean", "Six Sigma", and "theory of Constraints" methods (or a combination of them).
In any event, that site will point you to related sites and provide a rich source of leads.
Good Luck!!!