1. White V-Neck
Every girl needs one of these. Sure, they're simple, but in a good way! I'm a fan of the American Apparel ones; I have 'em in dark blue, white, gray, and purple. You can also find more generic looking ones at Victoria's Secret PINK, Target, and Walmart. I just love the AA ones because they're sooooo soft, tuck-in-able, and give off that awesome "yeah, that's right, I roll out of bed lookin' like THIS!" look.
2. Leggings & Tights
There's not really much to say about ballet flats other than versatile x a mil! Rock 'em with jeans, leggings, tights, skirts, shorts, dresses; THEY MATCH ALMOST ANYTHING!! Target, H&M, and Nordstrom BP are fab places to get these for pretty cheap. Get plain black to wear with other busy pieces, patent to be a little bold, or try colored or metallic flats to stand out!
4. Mock Two-Piece Dress
BP Velvet Torch 2-Piece Dress, $31.90, Nordstrom
BP Ruby Rox Scoop Neck Mock Two Piece Dress, $48, Nordstrom
BP Velvet Torch Tank Dress, $29.90, Nordstrom
Fab. Easy. Comfy. Cute. 'Nuff said.
5. Printed Skirt
BP Mimi Chica Cotton Challis Miniskirt, $24, Nordstrom
Printed skirts dress up a plain t-shirt (see #1), look summer-y with sandals, or autumn-y with tights (see #2). Great transition piece into fall from summer.