Feedburner has a way to add a sign-up field to your site that allow people to subscribe via e-mail. I don’t think it would be a good idea for a twitter feed but for certain blogs and podcasts it could be useful given certain content and target markets.

Make sure to create little personalized fields too – such as “conversational” a text field where you type a single sentence or two that engages the client on a level they’re familiar with, like “Hey Bob, how’s that new ERP system going? Sure was a bear to get running, but I bet it’s paying off dividends!” Save other stuff like nicknames (Ari for Ariel), casual language for locales (Oz for Australia, Hotlanta instead of Atlanta, whatever the situation dictates) and the like. Takes about a second to input, but it pays off in spades in terms of personalization. After you add all this stuff, you can send out marketing emails that look pretty much like a personal email instead of the usual “DEAR %NAME%,”

What people say they think about this kind of thing is irrelevant to the empirical data I’ve seen over about a decade, which conclusively demonstrates that you’ll get a higher interest level and click through rate when people believe that you’re talking to them – just a helpful hint (I hope).

As well, avoid stuff like “take my survey” or “check out my eBook” or other language that sounds like you want people to do something boring – try to be creative in your calls to action. People will respond to “take my survey” but they’ll respond in greater numbers to a link that’s named something more clever like, “Tell us what the Hell is wrong with us!”