What is the event? Is it formal, semi-formal, or all-out casual but nice? Is it a formal party or are you just casually hanging with your friends? What season is it? What will the weather/temperature probably be on the day/night?
What are you wearing? (Only needed if you’re in so much doubt, you can’t figure out what to choose. ) Which of my outfits do you think I look great in?
You can give a nod to current trends by adding an accessory that sums up the trend, be it by color, shape or logo.
Remember texture, prints, and colors. Contrast is nice, but when everything clashes, it’s going to spoil your whole presentation. A scarf is cute, whether it is a silk Hermès scarf or a knitted Burberry scarf.