It's as simple as:
Keep it dry
Store it in a cool, dry place out of direct sunlight
Condition with natural oil as needed
THE WHY & HOW
Pride & Archive pieces are polished to have such a tight grain that it functions as a type of water resistance, however the wood is not recommended or intended to be in water. If it does get wet, dry it off quickly and if there is any water spotting you can use a natural oil to recondition the wood.
Maintain the luster and finish of your wood jewelry by applying a small amount of natural oil. Every P&A piece is finished with Odies: Mr. Cornwall's Super Duper Everlasting Oil , but for follow up maintenance you can use any natural wood oil such as mineral oil. Gently rub a small amount onto the wood using a soft cloth, then wipe off any excess. This moisturizes the wood preventing it from drying out and becoming brittle as well as enhances its natural beauty.
How often should you do this? It all depends on the environment you keep it in, how often you wear it and the type of wood etc. The general rule of thumb is if you see it looking a little dull and dry go ahead and condition the wood with some oil. If you tend to play with your jewelry while you wear it (as it is intended to be) you will find that you won't have as much maintenance as the oils from your skin will help keep it conditioned.
Odies Oil has a natural UV inhibitor in it to slow the oxidation of the wood but all woods oxidize and can darken over time. If you want to minimize this it is best to store it out of sunlight when you are not wearing it. AKA: Don't leave it on your bathroom window sill.
Should you need to clean the wood portion of your P&A jewelry use only water on a soft, slightly damp cloth to remove dirt or debris. Wipe dry and once it is completely dry it is a good idea to recondition at this point with a natural oil as described above.
An example of when you may want to clean the wood:
Say you are at an outdoor market in the hottest part of the summer and you are perspiring A LOT while wearing your favorite P&A necklace. Afterwards you may consider wiping it off with a damp cloth to get the extra salt from your sweat off the wood since salt has a way of pulling moisture out of things.
P.S... People who wear P&A jewelry don't sweat, they glisten ;)