1. For colds and congestion, mix coconut oil with a drop of peppermint essential oil and rub it on your chest. I didn't have a cold and I wasn't congested so, instead, I put coconut oil and peppermint oil in a Misto oil sprayer and sprayed it on my arms and legs and rubbed it in. Nice tingly sensation, moisturizing and it smelled very energizing!
2. For arthritis and post workout pain, mix coconut oil with 1/2 t cayenne pepper and 2 drops peppermint oil and rub it directly onto wherever is stiff and achy. I tried this and, again, tingly and nice sensation but the cayenne is a little messy (don't wear white clothes while you do this) and it didn't provide amazing relief so...maybe try it and see how it works for you. I get the sense if you're someone who likes Tiger Balm (it doesn't work for me), this would be good for you.
3. For Eczema, mix coconut oil with calendula oil. My feet were pretty dry so I tried this as more of a dry skin treatment on them and it worked beautifully. If anyone has eczema and tries it, let me know if it's effective. Another good oil for that is black currant oil, but it's much more difficult to obtain.