It can't get any simpler than that.
Just try something new.
If you just read about a new business that someone started or just got an idea for a book in a genre you don't normally read or a field of study that you'd like to tackle, what's stopping you from trying it?
What's the harm?
Aside the fear of rejection or failure, even if it doesn't work, you at least tried something.
Now, when you find something you want to try, do it. Yoda once said, "Do. Or do not. There is no try."
Take the advice of the little green 800-year old dude and do it. Do it with excellence.
You'll be amazed at what you can accomplish.