-By the very least you should monetize the videos, this can be done after the first 1000 views.
- Add call to action to your videos.
- Frequently upload your videos, if you can upload ever sunday then stick to this method. If its every wednesday etc then stick to this frequency as users tend to fall into a bracket of expectations when checking out channels and will expect you to have new stuff on these days.
-Regading getting so many views per day do you know where all these hits are coming from and are you actively engaging the users when they ask questions on the channel?
-Post questions asking what users want to see next on the channel, always, always try as much as possible to engage your visitors who comment these guys are the one who took the time and you should always respond to them..
-Give props to users who have been active on your channel, send them a private message thanking them and as for recommendations.
-For users who come to your channel and give positive feedback you should also visit their channels and do the same.
Heres some more information directly from YouTube utilizing their Creator Playbook http://static.googleusercontent.com/...r-playbook.pdf