Basically i spent a large portion of my evening trying to make blue mist for my new user name and almost all of the guides i googled weren't too helpful so i mixed and matched and I'm going to share my improved guide with you all for my first complete Instructable.
Step 1: Setting up
1. Open up a new document in Photoshop,
2. Make it any size you want,
3. Where it says "Background Contents" set that to white,
4. Click Okay,
5. Use the Paint Bucket tool to make the background layer black
6. Create a new transparent layer