What are some natural methods to retain moisture on skin?

Always stay hydrated.

Put moisturizer on right after you shower while drops of water are still on your skin.

My wife uses either aloe or baby lotion, right after a shower.

The pores of her skin are open and applying one of the above is trapped inside,

Regular bath with natural products and avoid too much sunlight and cold temperature.

drink lots of water, coconut oil, wear a hat with a big brim.

The drinking water thing is a myth. Sorry.

If its your face then don’t wash it with soap, use a cleanser and toner instead. For the rest of your body don’t use too much soap or body wash as it will just strip the natural oils right out.

Keeping hydrated will make sure whatever you’ve ingested throughout the day through your skin, lungs, and digestive system can move through your system. Otherwise, your skin will show signs of irritation through dryness and blemishes. So drink water!
Also, if you’re _really_dry, you can apply small amounts of olive oil to your skin while you’re still damp from showering.

Cosmetic olive oil is great for the skin. I used to put a few drops into the water when I bathed.
Try it ;)