There is evidence that being able to visualise something helps you achieve it. Like nobody thought they could climb Everest but once someone did then suddenly a few people were able to afterwards (don't take that example literally, I can't remember what the actual examples are).

I think visualising success and having full intention of doing something does go a long way to be able to make it happen. But I also don't believe in the supernatural so I don't think you can fully will something into occurring. I do think there is more to energy and energy transfer going on in the universe than we yet understand or perceive so I think creating certain energy may attract the right energy but even then I wouldn't think it's a precise science that you could will yourself to be $1000 richer for example and it'll just happen.