Test the desired transplant location for your blueberry bush with a soil test kit. The Ph value should fall between 4.0 and 5.3. If the soil Ph is higher than that you will need to add organic compounds to lower the Ph or your bush will not survive. If you've done this far ahead of time (six months or more) you can add sulfur to the soil to gradually lower the Ph to an acceptable value.
Dig a hole approximately 18 inches in diameter and 18 inches deep to accommodate your blueberry bush. The shallow root systems are easily fit into a hole of this size.
Fill the bottom of the hole two to three inches deep with peat moss or milled pine. This will present a nice acidic base for the roots of the blueberry bush to anchor into.
Place the blueberry bush into the hole so that the root crown is just above the surface of the ground. Fill in around it with a 50/50 mix of peat moss and dirt.
Mulch around the entire area of the dig. This will prevent weeds and grasses from infringing on the territory of the bush while it is anchoring itself and sending out new runners. It will also help the ground retain moisture and keep the plant roots cool.