This might work:

1. Destroy the opium crops.
2. Withdraw all military and non-military personnel.
3. Nuke Kabul, Kandahar, Quetta, Islamisbad & Tehran, and all known nuke facilities in Pakistan & Iran.
4. Quit the UN and chuck those unelected freeloaders off of US soil.

But then, if I was W, I would not have invaded Afghanistan or Iraq in the 1st instance; I'd have invaded Saudi Arabia, flattened the mosques in Mecca & Medina, nicked the oil, and not call it 'War On Terror' but a 'Crusade Against Islam'.
Then again, if I was running the World, 9/11 would not have happened because there would never have been any Moslems in the USA to carry out the operation. Moslems belong in Islamic lands; whatever possible use could there be for Moslem countries other than keeping Moslems in?