Don't try so hard for view's, be yourself, do something unique, and the most subscribed you tuber's are often funny, and has a unique username, like Pewdiepie, he's very unique, funny, creative with his video's and all of his video's are different, and adore's his fan. Try something that people would be interested in, be laid back and don't try and beg for subscriber's, as that create's a turnoff with the viewer's. Don't say something that someone would be offened by, as viewer's on youtube are alway's fishing out bad detail's about the youtuber (mostly the hater's).
Pewdiepie recently reached 19 million bro's, but before all that happened, from square one he was just making Minecraft video's, and was just a normal guy playing video game's on youtube. He didn't show his face on his video's, but once he showed his face, he had more viewers coming to his video's, because he often got scared and screamed in his amnesia video's, and just has a lot of face expressions, which created a lot of attention.
Just do something creative, and make the video's well organized, and maybe even do something that you love to do, like Michelle Phan, she love's doing makeup, or maybe comedy, like Shane Dawson, he love's making people laugh, and that's what's he's best at. It take's time to develop a fan base, and people will slowly come by you're account, and absolutely do not promote you're account on other video's, as this is trying to hard. Hope this help's :)