Most of the streams that have lots of viewers have either been around for a while or are of someone really well known (like an invite player for example).
You aren't going to get 100+ viewers overnight by doing certain things, but I'm sure you already knew that. The best thing you can do is to develop a viewer base by consistently streaming and consistently entertaining. Simply, the more you stream and the better you stream, the more followers (like actual people who watch your stream not just the follower count) will be devoted to watching your stream every time you hit "start streaming."
Interact with your chat, entertain people by doing stupid stuff, DON'T just sit in mumble and talk to your buddies. Talk to the chat. They're your new buddies.