I found the IoT Directory is a very good resource to search for IoT related companies -
http://www.iot-directory.com/. In this directory, there are 4 categories, software vendors, hardware vendors, end-to-end providers, and connectivity providers and hundreds of companies.
Whenever you have time and feel right, you can pick some companies from it and start to send emails to them to introduce IOTA. Maybe some companies will be interested in IOTA and will try to incorporate IOTA into their system to gain more market shares, especially those small startup companies which are more willing to take more risk to gain market shares to survive.
Maybe someone who are good at English writing can write a short generic letter to introduce IOTA and we all can use it. All each person needs to do is to find a contact address for a company from the directory and send an email to introduce IOTA.
This is something everyone can do.