You have to put your intent into it and be able to visualize, and believe what you're visualizing will make that paradigm shift. And if your new, you work on the poppet more than once. You may also want to call your deities while working with a poppet. You also may want to take into consideration what works best for you, and that is by trial and error. I've always had this concept that what one says, in spiritual matters, is spirit-power at its raw pinnacle.
To me, making or dealing with a poppet it all has to do with the meanings of the ingredients behind it, because magick, to me, has a universal language. I think poppets are a great medium for work. You really think about it, it is making what you want to manifest on the micro-scale. One representation of a person is simply thinking about a person, and by that person you ponder they are there in your mind as you will.