Is getting success that difficult?

I always liked to do new things and that is great and I enjoyed it very much but for few days I am observing that this experimental nature of mine is getting between me and my success. I try something, become a bit successful with it then I start something else, overlooking the previous task, and become a bit successful, again. Finally what I have is two incomplete and less successful jobs in my hand. 

I need to stick to something I think can be made better and built on it.

Recently I purchased some nice domains and also figured out some nice niches that can bring me nice traffic and money too.

I don't think success is that difficult for me but I just have to make and stick to a plan.