I’ve already done a blog on this topic and linked to Konrath’s blog with his tips. I’d like to discuss it a bit more but since I’m going on holiday in a few days I want to keep it short so one way to help yourself writing good dialogue is to watch and read things with good dialogue.
Films are especially good as the dialogue is often very important. If it’s even slightly boring people switch off from a film and good acting combines the dialogue with the right amount of body language to give you everything you need for describing those character interactions too.
The film I’d currently recommend as one of the best to see to learn how to do some pretty awesome dialogue is The Avengers. This film has some of the best deliveries of lines and some of the best lines themselves that I’ve seen in a long time and is well worth the watch for that alone (of course it helps that the rest of the film is awesome as well).
And of course the best thing is practice. So keep writing folks.