The common bits of wisdom floating around in places like reddit.com/r/twitch are things like: Make a
schedule and stick to it, create a theme,
talk constantly and especially to your audience, be yourself but be entertaining, do it because you love it not because you're trying to make money, get a good mic and webcam, don't
stream over-saturated games, and do giveaways if you want but be careful that the audience might not stick around.