What advice can you give for someone who is just starting out?

I've actually been sitting on a podcast show idea for years and I am stable enough to start making it/getting it out there. You are one of my inspirations for doing so as well as a few others and I'm wondering if you have any advice from when you started out to until now.

Like what kind of equipment to use or what would you have done differently if you could go back in time to change things? Overall what have you learned to have a successful show and what makes you keep doing it?