They say, never use a leather bag if you're wearing sneakers. To borrow the words of my former prof, Mr. Danilo Franco, "Know the rules**, just so you would know which ones to break". I agree.
**rules in fashion, not the 10 commandments! wink wink ;)
Shirt from John Mayer Concert in HP Pavilion, Tank Top from Top Shop (worn inside), Jeans from Diesel, Sneakers from Reebok, Bag from Fino