Keep it Simple
First, keep it simple. Even when I buy something different, like the type of collar or color, they are simple. My rule is that the jacket needs to be simple for versatility. For instance, not too many buttons, zippers, or other flair. Otherwise it looks too busy and gets a bit cheap looking.
Additionally, another simple leather piece is a pair of faux leather leggings. You can see how I styled mine here.
Also, I think that keeping simple works for how to style a leather jacket. I just paired it with high waisted jeans, a scoop neck top, and boots.