First Vickie needs to go. And it needs to be done in a manner that will actually make people sympathetic towards Vickie.
After that Ziggler needs to make something clear; he won't be cashing in the MITB briefcase for some time. He's not waiting for a particular date or moment, he's not trying to do anything honorable, he just wants to be ready. He doesn't want to end up like Swagger, Christian, Orton, or Jericho, all guys who won the big one but ended up spinning their wheels, careers dead ended. When he wins the title he wants it to be his crowning moment, no one will question his ascendance.
After his motives are clear he needs to go on a tear. Heels or faces, he's fukking them up. No tweener shyt, Ziggler is the WORST of all evils. If he can't outwrestle them, he's cheating. He's not taking ANY L's. If you pin him, you're getting fukked up post match. He's attacking guys randomly. fukking up diva matches, ruining main events. Not only that, but as future world champion he feels he's above all the other belts, which means he's fukking up title holders. Tag champs
. IC champ
, US champ
, WHC champ
, WWE champ
, Divas champ
After all this, he finally cashes in the MITB and wins. Bingo, you have a credible world champion.