What type of suitcase do you have? I "roll" my clothes to be more wrinkle free. I also place shoes in bags so they don't get clothes soiled. In addition, I use 1 gallon zip lock bags for undergarments and any small items you may have.
Choose a color palate so everything goes together, like red and black. Choose things that can do double duty, like a top that can be dressed up/down. Think about what types of activities you'll be doing-business meetings, dinner parties, hiking. Have fun!
Hi Claudine, here is some information I hope will be helpful when you pack. Have a wonderful time. How to Pack a Bag or Suitcase Efficiently - Method 3 Making the Most of Your Bag
If the trip is to somewhere that provides certain essentials or you know there are stores close by - then don't bring things that are going to be there that can take up valuable space. I have sometimes mailed boxes to myself (either to my destination or home) with the extras. It all depends on where you're going and why. Three days is a short time. Without knowing the occasion, it's hard to give more specific advice.
I would roll your clothes to save space and use packing cubes