Develop your ideas on paper so you have a complete concept that can last for more than one season and remain interesting. Write out all your ideas into a complete television bible which includes a log line, one-page synopsis, treatment, future episode guide, character list and detailed character descriptions.
Register your idea and work online with the Writers Guild of America. This will protect your ideas and help prevent someone from stealing your ideas and using them without giving you proper credit and payment. Then purchase a copy of the Writer's Guide to Hollywood Producers. This is a guide that is published quarterly and lists all the producers in Hollywood and New York seeking film and television projects, along with what they are currently seeking and how to submit your ideas.
Write a short query letter selling your concept and making it sound as appealing and interesting as possible. Go through the writer's guide and mark all producers looking for television ideas. Send out your email or mail queries. Wait for a response.
Carefully read any replies that include a request to read your work. Mail or email the work requested. Follow up on all your submissions and requests. Make sure you are respectful in your communications, but persistent. Hopefully you will be called in for a pitch meeting where you will get to meet with the producers face to face and discuss your concept in more detail.