Pulling off a denim-denim look is so easy. It is by far my favorite look that anyone can pull, at any season. All you need are a couple of key denim pieces. You already have the jeans so go look around for a couple of nice denim shirts. Levi's is a good start (especially now) and so is The GAP.
This look will provide you with endless possibilities and expand your tiny closet a long way. Adding key accessories will help create a new look for you too, despite wearing the same denim pieces.
Below is what I was wearing today:
GAP denim shirt
Paige Premium denim skinny jeans
Louis Vuitton scarf
ASOS satchel (my favorite accessory out there)
YSL Curvy Platform
Casio G-Shock watch in metallic purple.