Creating a Podcast... tips and tricks

So... we've decided to put our toes in the water and create a podcast for our target market, we have roughly 1000 followers on LinkedIn, with the same roughly on Twittter, who we believe will be interested in our content.

Our initial aim is to put together 1 podcast a month, to suppliment other marketing/blogging, interviewing industry leaders in our sector (Change Management), we'd then publisice this and grow our audience.

The primary aim of all of this would be marketing, and becoming a thought leader.

What is a good way to start, and not fall off the rails quickly?