You must give as much life to the result as you can so that you will know when you reach it. What does it look like? How does it feel? Can you taste it? What would your friends, family and other people say? Can you smell it? Yes, money has a smell as does a new car, plane or boat. The idea is to get as many of your senses involved as possible.
Don't worry if your vision isn't about saving the world; it's your vision and it simply becomes the target of your focus. Once you have your focus then you will be amazed at the opportunities then seem to come up out of nowhere. They were always there its' just that you were not paying attention.
Creating a vision may take a little or a lot of work at the beginning but practice will make it easier as you start accomplishing your visions. Start wherever it requires to stretch your abilities.