This year I decided to go with simple decoration for my office. I hanged around 18 paper snowflakes.The materials that I used can be found almost in every office: A4 photocopy paper, a classic paper punch, thread and a laminator machine. Just that. So simple. Cut, laminate, punch, hang.
I didn't used a tutorial, it's something that I remember from when I was a child, but you can find a lot with a google search. For example, here is Marthas Stewart tutorial. And patterns here and here to make your life easier.