I'm a reading a novel at the moment, "From the dead", by Mark Billingham, and noticed something interesting about dialogue. Sometimes the writer would do something like: "How are you?", asked Bob. Mike said he was fine and thanks for asking. "So, do you have the money?" Seems odd, when Mike's line could just as easily be done as dialogue as well, but I guess it breaks up the text, rather than having lots of dialogue, which is what I appear to be guilty of in my first writing project. The question I then have is: how do you decide which bits should be left as dialogue, and which bits could be narrated? There are lines that obviously have more power when said as dialogue but in some cases it doesn't look like it would make much difference if you swapped the dialogue and narrative elements around; it's used purely just to break up dialogue.