Many shy away from purchasing fresh pineapple because they do not know how to slice them. There are some tools on the market that will actually slice, core and peel the pineapple for you. You can do the same thing with a sharp knife. You should first cut off the top and bottom of the pineapple straight across. You can then begin cutting down the sides to remove the skin. You will need to cut fairly deeply to get rid of any skin pieces that may be left. You then cut off sections as close to the core as possible and then cut those sections into slices. The only way to get pineapple rings is to use a device to remove the core and then cut your slices.