I did an episode at http://www.schoolofpodcasting.com/727 where I provided 30 tips to grow your audience, but I forgot this one.
You can have more episodes in your feed which makes it easier for subscribers to get your episodes. Some apps like overcast.fm have an "ALL" button where you can download all of a podcast's episode
Start your podcast at www.schoolofpodcasting.com/start
Work with me www.schoolofpodcasting.com/workwithme