These are all good ideas, and mine is along the same lines. My younger child had a nuk until he was almost 4. Right around the time he turned four, we had started talking about the nuk fairy, and one night he put all his nuks in a bowl and put them under his bed. The next morning when he woke up there was a cool toy in place of the bowl.
One thing I thought about beforehand, however, was that my son clearly used the nuk for self-soothing. By the time he was three he was only allowed to have them when he was in/on his bed, so he'd take breaks and go up to his room to pop in a nuk and read and feel calmer.
So when the nuks were gone, what would he use? I watched him carefully, and noticed that he liked to sit on the bottom step of the stairs going into the kitchen, so I set up the shelf next to the stairs with a basket of little toys, kid magazines and toy catalogs, and our library books. Sitting on that step and reading became his new self-calming spot.
I would think about why your child "needs" the nuk, and have an idea of what will replace that need.