You will need either an airtight jar or bottle to keep your blueberry vodka in, something like a kilner jar would be great - I'm using a decanter.
You'll need to wash and remove any stalks from your blueberries, and then prick them. I used a cocktail stick but you could use a skewer or even the sharp point of a knife.
Once your jar/bottle/decanter is full of blueberries then add the vodka.
You'll need to leave it for at least two weeks and shake it daily if possible, or at least quite often.