Don't make a lot of sounds when you move. Again, put your back to the dog. When you are walking around, it might help an extremely frightful pup if you walk around backwards at first. While this is awkward, it makes sense, and it really helped my fosters. Find out what motivates the project canine.
Some dogs are food motivated, while others are motivated by going for a walk.
What ever you can find that takes the dog's mind off of you and on to the motivator. Jealousy can be a good thing. Some dogs will be motivated to come closer to you when they see other dogs being petted, loved on or getting treats. Canines can model behavior. Timid dogs will look to see other dogs' behavior.