1) Have you written a post in the past that has encouraged readers to do something other than just comment on your blog?
I don't think I've done this too often. I have written a few posts linking to other blogs and asked people to go and comment on another blog. I've done 'delurking day' where I've asked everyone to leave a comment.
2) How has this task changed the way you look at making your blog more interactive?
I think that one really good point Darren makes is that a call to action doesn't have to be something huge. You could be asking people to comment on a particular post, asking a simple question, putting up a poll, or asking people to visit your profile somewhere else. It doesn't have to be anything huge, but it gets people to participate. It is always fun to ask a question at the end of a post and see how people respond. I think that this definitely tweaked my mind a little bit in thinking about how to make my blog more of a community or how to turn comments into more of a discussion.
Today I wrote a call to action for my readers - I want to know where you're from, and what says 'home' to you. Day 22: Tell Me About the Place You Call Home