I have a simple plan going on in my closet: Black & white! Essentials? Heavy metals to bling it up. 
The truth is that even if you are that kind of person (like me!) that always tends for the weirdest piece hanging in the store you still need your daily basics. I'm not telling you should buy whatever cotton T-shirt you find in the closest store and definitely not saying that you should buy that Givenchy plain white T-shirt just because of the label stitched on the inside that nobody will ever notice. The point is, 
get a medium range! I like relaxed T-shirts so instantly fell for these ones. T by Wang Slub Classic Tee in ivory colour and Slub Classic Muscle Tee in Black and the best accessories for everyday: Givenchy shark tooth necklace and Céline Audrey sunglasses.