Sanctions don:t work. Cut them off, and someone sympathetic to them will bring in the supplies, food and/or aid necessary to continue; sanctions would be political in nature, with not an Iranian going hungry, homeless or shirtless as a result.
Don:t surround the country with any military presence.
President Obama will have that desired luncheon with Ahmadinejad, both can smoke their cigars and world peace can remain an ideal until Ahmadinejad flexes a muscle in an effort to see what Obama is really made of. Obama keeps his word, impresses upon UN leadership to keep level-headed in the matter, Ahmadinejad:s grand-standing and posturing dwindles down to drivel. Israel, though always on standby and on orange alert, takes no pre-emptive action against Iran.