In my opinion, the best way to bring people to your channel, when it is small, is to be very active on other peoples videos (both big and small channels). HOWEVER, IT IS VERY IMPORTANT HOW YOU GO ABOUT THIS. No matter what the comment is, reply to it with something that is helpful to that person without saying anything about your channel. For example, if someone leaves a comment that says "Man I'd really like my channel to grow more," you could reply "Don't get discouraged, because growth at this level is very difficult, just keep at it and you'll start to see success." Nowhere in that reply did I say "check out my channel," "sub 4 sub," "subscribe to my channel and I'll sub back."
- Vulpinox