i'm sure there are huge differences with the OC take on these items and the RC (which is where you got the word "sacramentals" from, I take it.
We use incense, icons, holy oil, holy water, candles, crosses, etc. as part of our worship. Medals are not quite used in the same way. there are "fylakta" or parts of holy things that are worn, or you can have a medal of a saint around your keychain, or even your necklace, but the way they are venerated is probably quite different than in the RC church.