Know-How Exchange : Strategy

I would start a referral program with past customers, with other complementary businesses that do weddings etc. If you can partner with other businesses, then you can feed off of their advertising and offer them something in return - discount, services etc.
Hope that helps!
Bill

Start generating press releases. If you have paid for advertisements in the past, you should have enough emotional collateral with local newspapers to get some free press. It can be anything - how many years in business, a special event you did, even just an article on how to choose a caterer or get the most from your catering can be of interest to editors. Also take advantage of social media - start a facebook page to showcase specials, events and other news. That will help your webs search results and give you a format to offer tips for party planners allowing you to be seen as an expert/first choice when it comes to catering an event. Good luck!

You should be doing more. Get the phones ringing by doing some dialing on your own. Everything you are doing is passive, you need to get aggressive, and become a guerrilla marketer. There are hundreds of low or no cost marketing tactics.

Take a niche and be lasar sharp in your tactics. In your biz, one could be catered lunches. In any area there are thousands of companies that order in lunch every day, why isn't it from you? It may be as simple as asking for the business.

Architects, lawyers, accountants etc need continuing education credits to keep their credentials current. Sales reps (I was one) are trained to deliver non commercial lunch presenations to these groups. Larger firms allow no more than one a week, and larger firms might have a 6 month waiting list. A new rep coming in has no idea where to order these lunches. The person coordinating these luncheons often maintains a menu list of preferred caterers. Think of what even 10 clients doing 15 box lunches a week would impact your next salary review.

There is a person in Denver called "the Food Guy" who sends monthly emails out with seasonal themes on these lunches only. The firms appreaciate it-- these weekly luncheons get boring.

Think of other groups that cater regularly. Nonprofits, trade orgs all hold monthly meetings-- all catered. It might as well be you. Fusion market with wedding suppliers. The list is endless-- once we get you into a marketing frame of mind.