How to train our creativity?

Hello, as a "designer" we have to be creative. So, how to maintain or improve creativity?
I just want to know from many point of views.

Dare to dream and Always strive to be different.
Years ago what I use to do is look at stuff on deviant art and try to recreate them in my own way. Also just finding a really good artist and studying their style. It sounds like a contradiction to what I said earlier but it isn't.

1. Mind map gan, new & original idea guaranteed.
2. dictionary as other part.
3. think out of the box.
4. never stop learning
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