I agree definitely that sub4sub schemes are not the way to go. It's all about consistency, originality and just generally enjoying what you're doing. You shouldn't look at YouTube as though you have to make it to 100 subs by next week, 1000 by the end of the month. Ultimately, making YouTube videos is about enjoying yourself and getting to know the community, forums and the sort and making friends with people just like yourself. In time, the views and subscribers will come along, it's partly to do with luck, mostly to do with consistency and interaction with others.
I hope that this can give you a little inspiration to enjoy making videos and keeping those uploads going!