The best ways to attract corporate clients or even attract more corporate clients is to.
Build rapport over voice-mail.
Invest in a professional phone system.
Design products and services around the technology they use.
Find out what they don't want to do.
Learn about their sales process.
Get private testimonials from other corporate executives.
Match their working style.
Attracting corporate clients can be hard but if you follow the above you can easily attract new corporate clients.