I've had eczema all my life, although in adulthood it's confined to my hands and legs from the knee down.
I used very powerful steroids when growing up - synalar and diprosone mainly. It has thinned my skin, my hands are quite wrinkly and shiny. Moisturisers only prevent itching but are invaluable.
I'd advise to keep the affected areas out of water as much as possible - don't over-wash & use as little soap as possible (I don't use soap at all). I use vaseline to reduce itching & protect any dry areas.
Someone mentioned sunshine and saltwater - they have a very beneficial effect on me as well. I try to get my legs exposed even in the winter when I can, doesn't need to be strong sun.