One way to ensure a moist banana bread? Make sure the recipe calls for honey!
All sorts of quick breads -- from banana, zucchini and corn to beer, herbed and cheesy -- benefit from the sweetness and texture of honey. Honey adds a distinct but mild flavor to quick-baking, non-yeast breads, which can be delightfully easy to prepare (no waiting, no kneading!).
Honey is sweet but not too-sweet, so it's perfect for the more savory flavor profiles, such as the cheddar bread you serve with those honey-baked beans, and it helps achieve the moistness that is a necessity for any great quick bread. You'll also find the bread stays fresher longer, since, as we already know, honey acts as a natural preservative.