Even if you're not looking to decorate your own store, the Ikea Business website has some helpful tools. We had a lot of fun with the Style Finder, which asks you questions to figure out exactly what type of interior design style works for you...We were "modern rustic", which despite sounding like any oxymoron is exactly how we consider our style to be. The test even breaks down your score by three categories, showing what percentage of your style is "modern", "Scandinavian", and "country". A really great tool if you need help solidifying your look.
Take the test here.
Image: Lame-Queen via Ikea