Hi Bruce, I use levemir and have found that to get the best control, you need to take it as a split dose, generally around 12 hours apart. The first time you change your injection timing, for a rough estimate just divide the number of units of Levemir you take by how long you get good control for, in most people this is only 10-14 hours, then adjust your dosage. Example you normally take 12 units at 8pm, and get 14 hours control, you want to change to 8am, so divide 12 units by 14 hours= 0.85 x12 hours =10.28 units, round this down to 10 units.
This is a rough way of working it out, and every one is different, so I make no claim that this will work the same for you. Also levemir being a basal insulin has no effect of when you eat or what you eat, it only controls your rising bs levels when you do not eat.