The style advice Jenna Lyons gave on Oprah is so versatile, it can apply not only to fashion, but also to interiors.
Make a statement with jewelry.
The obvious translation of jewelry for interiors is accessories. You can make a statement using a large (but cohesive... for the love) collection of trinkets or just a few carefully selected pieces. I love this dresser vignette from Caitlin Creer. In a very literal application of this piece of advice, she uses some actual jewelry to jazz up the space. And why not? Jewelry is beautiful, there's no need to hide it.
Balance feminine pieces with tomboy accents.
Even Shabby Chic queen Rachel Ashwell isn't all about the girly. In this kitchen, she has used more "masculine" elements like the exposed walls and ducts, clean-lined cabinetry, industrial pendants, and glossy concrete floors to balance the femininity of the crystal chandelier, flowers, and floral china.
Rooms that look straight off the showroom floor or a period textbook are so boring. Mixing styles, colors is what makes a room personal, unique, and interesting. I love this use of traditional art and frames within an otherwise modern room.
This is also a good idea because your taste will change over time. If you have a lot of variety, there's a better chance you can mix things up to fit your changing taste. HGTV has a nice little gallery of ideas on how to combine design styles here.
What it lacks in color, this little bathroom corner makes up for in terms of texture. Shiny, brushed, and satin metallic finishes, wood, porcelain, tile, lucite, cotton, textured wallpaper... the options for texture are as many as the options for color.
From this shot of Jenna's living room, you can see she uses her own advice... and it works!