Wear a single colour head to toe.

It sounds like the kind of advice you’d get from a fashionally-challenged individual I know, but you just need to go with this one. There’s a right and a wrong way to do it however, simply matchy-matchy isn’t going to get you any points. You need to play with textures and fabric here, if you can mix a print in there then do it. If you’re going to wear something leopard print, pick up on the ochre tones for example. Don’t repeat the leopard print. That would just be scary.