I'm thinking of creating mini-lectures (no more than 10 minutes) in order to get around my lack of experience avoid monotony. How long are other people's podcasts? Does length matter -- or do you just assume that students will listen to podcasts in pieces, if they're much longer?
I would suggest short and covering only a single piece of some topic. Label them well, and students will (er.. should.. er... mostly like will.. er.... might) listen to what they need to get better at your subject.
Practice before recording.
I don't do online teaching but I saw "podcast" so I jumped over.
I've wanted to do podcasts for some time for my chemistry classes but I just haven't taken the time to do any. I bought ProfCast so I could make podcasts out of some of my PowerPoint files. The idea of small, targeted files is a good one, I think.
Something of substance but not too long that students avoid them.
Alan