Well, as someone who has struggled with eczema her whole life (to the point where it became like welts or sores on my body, I would even make myself bleed in my crib from scratching!)... I'll tell you what I do and what's come to work for me. And other than occasional flare ups that I have to target with steroid cream, the rest of my body is like satin.... to the point where people compliment me all the time, so yeah... I think I've got it pretty down pat. Most of these came from dermatologists/specialists over the years, but some I've learned on my own.
-Soap only on those "hot spots", as mentioned above, except for the occasional full body scrub.
-When you do use soap, use a very mild, unscented soap, such as a Dove body wash. Scents in soaps can actually cause sensitive skin to have a lot problems.
-Moisturize at least once a day, your entire body, and every time after you shower. A great mild moisturizer that a specialist in San Antonio recommended to me two years ago is Cetaphil (bought at Walgreens, Target, Walmart, etc, for about $13 a jar). Like someone said above... use the CREAM, not the lotion! So much thicker.... I also love Cetaphil's Gentle Face Wash, also recommended by the specialist (my face is my worst spot).
-Since I've started my healthy lifestyle kick these past six months or so and explored new things... I've discovered crushed flaxseed (which I put in yogurt, cereal, or oatmeal) & Fish Oil pills taken daily have done WONDERS for the softness and feeling of my skin, not to mention my nails and hair have gotten much thicker and shinier.
-Vitamin D supplements have helped too!
Good luck!