1) Buying expensive equipment before starting - dip your toes and with the basics. 2) Not promoting your podcast - if nobody knows about your podcast it will be hard to have the motivation to keep working on it. 3) Starting without a unique voice - find a niche topic/ audience or a unique format. 4) Thinking you could make easy money - it takes time and dedication to build a steady audience that keeps coming back for future episodes. Without that you won't be able to monetize your podcast. 5) Not starting because you are afraid to commit for long time (your podcast can be a limited edition).