a) get a minimum amount of the economy & utilities functioning;
b)get the political process moving with the Iraqi council;
c)train a new Iraqi police force and army to take care of security;
d)withdraw most troops and leave 1 or 2 divisions in 'over-the-horizon' locations to get them out of the Iraqi's faces but let the bad guys know we're not going to let them come back.
Seems pretty simple and good (but not easy to implement). But we've already started.