A great jacket like that is bold and doesn't need other big bits of clothing but it does help to accessories. I would wear a really cute shoe/ boot. Here are some that I found and would recommend. The first one is a high heel from Topshop £150 a little expensive but I think they are gorgeous. Secondly, these are another option if you don't like heels that much or if you are on a budget. They are only £38 from River Island and the darker colour is £60.
I will be doing a look book soon and will be using a big coat in that but it isn't one on here and I will say where I got it from and how much it costs. It will show what I like to wear with them also. You might be able to tell there is a bit of a theme going on in the places to get them from. They aren't the only place you can get the products from just some of my favourite shops and ones I have read about in magazines. Hope I helped!