I experiment a lot with salves, lotions, and liniments. I've had good luck with a goldenseal/rubbing alcohol infusion for sore joints. It's a bit messy and kind of orange (from the goldenseal), so I usually put it on outside. I've also made several face and body lotions using various oils, aloe vera, and herbs. I was keeping track of all my various potions, but my computer crashed and I lost much of it. Starting over and keeping that information in the cloud now. My go-to resource for reliable recipes is Rosemary Gladstar. I have one of her books (I think she has written several) which are good at explaining the how-tos and also encourages deviating from her recipes to suit your personal needs.
I don't take any medications and rarely get sick, so haven't experimented as much with medicinals - although I did make a good throat syrup for Xmas gifts this past year. Lost that recipe as well, likely from Gladstar.
