If I could live in a basic T-Shirt and ripped Denim I would. This outfit combo is what I feel the most comfortable in and there are so many ways to accessorize and mix things up.
A closet staple that I highly recommend is a Grey T-Shirt. I have spoken about my love for basics HERE, and a Grey T-Shirt is definitely included.
One of my favorite ways to wear grey is with white denim. There is something about this combo that gives such a clean polished look, while still being casual.