You'll have to practice maintaining the style and continuously evaluating your work to ensure that it "fits" within that style, of course! lol. Sadly, there's no mental "switch" you can flip to "freeze" your artistic style. And besides, even if you do fall in love with a style, you might not want to try such a switch if it existed. You can try and maintain a favorite style, naturally, but it's always good to continue to be open to other influences, of course. :3