to be honest, every time I tried to do methods to get my plants to grow faster, they turn out to be either hermie, or a male. The only times I had success were when I just sat my a$$ down, and got patient. in my perspective, a plant will grow better if you try to mimic its natural environment as much as possible. Anything more or less would just cause stress. and we all know what stress leads to.
But usually after your plants are about 2-3 weeks old, uses nutes that contain a good amount of nitrogen, but its pretty important not to overdo it. add your nutes about every other watering. (at least thats what I do.) During flowering, your going to want to use nutes that contain a good bit of phosporous...to put simply. I had some pretty good success from this.