#6 - The Well-fitting Black (V-Neck) Shirt
As lazy as it may seem, a surprising number of women prefer well fitting shirts as an outfit. The idea here is simple: black compliments most skintones, a well fitting shirt shows off a good body, and most people wear outfits like this regularly anyway.
The Takeaway: When you choose to wear a t-shirt of any kind, make damn sure it fits you well.
How to Perfect It: Most bodies will find American Apparel t-shirts to fit fairly well, as they stretch -- but beware, they are rather pricey. "Athletic fit" t-shirts are also a good option, pending you have the build.