I cold bid about 50 commercial accounts every February/March. I drive around write down costs on lawn, landscape bush trimming every thing applicable to their property. I put in a NICE bid package (meaning I spend a couple bucks to make it look decent) Include an itemized list of costs, projected costs for the year also include a personal letter about my business and the benefits and services I would bring to their business as well as all the services I offer. Sometimes they hit and I get calls but I've found a lot of times people call me the next year. Even if I don't get calls, every year I drop off a packet at the same locations. I hate calling and pestering people. Putting real numbers on their desk seams more effective.