A commonly asked question! My first and foremost answer is to wear what you feel most confident and comfortable in! That doesn't mean you should wear your sweatpants though ;)
Some simple rules I like to follow:
°stick to simple, flattering silhouettes
°wear colors that are flattering to your skin tone — you never want to look washed out
°no crazy, distracting patterns or logos that pull focus from your face
°don't be afraid to mix patterns and colors of the same palette
Ultimately you know yourself and what flatters your body the most! This family did a great job of following all of these rules. If you need some inspiration, check out my Pinterest board https://pin.it/4cKoVFM.