This should be the first question everyone should ask themselves before they start any venture. If your heart isn't in it then you will surely fail. Many people start projects without knowing why they are getting into it. Probably they were influenced by friends or family and it wasn't their choice to begin with. If it's something that YOU want to do then success should come easy.
Well, success never comes easy. There are setbacks, cutbacks and obstacles in your path. But all that is just life testing you to see if the goal is what you really want to achieve. If it's not for you then you will give up at the first sight of defeat. Know what it is that drives you. What are you most passionate about? Make a list of all your favorite hobbies and activities and start from there. Once you find something that clicks, picture yourself being already successful at it.
A lot of people are afraid of success. They feel that they aren't worthy of their heart's desire for some reason. There's nothing wrong with being humble but in order to be a big shot you have to think like one. Just don't step on anyone else's toes on your way up because they are the same people you're going to face on your way back down. Nobody made it to the top all on their own.