My very first attempt at remote viewing was to find two books I had lost. This occurred right after I moved into my current home, about nine years ago. At this point I had unpacked about 85% of the stuff in boxes, but in a couple of cases hadn't yet decided on a permanent "home" for some things. All of a sudden an urgent need developed for me to access two particular books, but when I went to where I had just set up the bookshelves a week before, the books weren't there. A sense of panic gripped me. These particular books are two very small, very thin paperbacks (they are roughly the size of 4 x 6 index cards); thus, they could have been anywhere.
I decided right then and there to give remote viewing a try. Up until then, I had merely read about remote viewing; I had never tried it on my own.
I immediately just lay down on the floor and went through a simple progressive relaxation routine. I alternatively tightened and relaxed the various muscle groups in my body. I also started slowing my breathing. Finally, I simply tried blanking out my mind, trying to think of absolutely nothing.
After about 5 - 10 minutes, when I seemed to be nice and relaxed, I gently started "asking my mind" to show me where the books were. What happened next was so different, so striking, that it remains vivid in my memory even today.
The remote viewing literature is full of examples in which the point of view of the remote viewer seems to "zoom in" vertically from high in the sky. That is exactly what happened to me. It was as if my "mind's eye" came zooming in from the sky, through the roof of my house, and came to rest hovering directly over these two books, which turned out to be on the top shelf in one of my bedroom closets. I want to emphasize this point again: I experienced one "vision", and it was of looking down on these two books as they lay on the top shelf in a closet in one of my bedrooms. These books were not readily visible from outside the closet, even with the closet door open; they were pushed back somewhat from the front edge of the shelf. I immediately stood up, walked to this particular closet, reached up and located the books exactly where I had seen them in my vision. I felt a little tingle of excitement run down my spine; son-of-a-gun, it works.
Of course, a skeptic would say that since I was the one who misplaced the books in the first place, I was simply allowing my subconscious to retrieve the memory of where I placed the books. That's OK, because my goal was simply to find the books, not prove the existence of RV. However, the unique point of view of the image which developed in my mind leads me to believe that it was RV. Over the last several years, as I've gotten more seriously involved in RV, I've experienced the phenomenon dozens of times, so I am no longer worried about proving its existence to myself or others.
So, I recommend giving RV a try to locate your lost necklace. The main thing I want to emphasize is to not place a lot of pressure on yourself to succeed. Relax, have fun with it.