Same texture names

This might seem trivial, but DON'T use the same texture name in multiple objects.
If two meshes use two different textures with the same name, the first object that was created will look fine, but the second object will use the texture that was loaded first.

In fact, don't use the same texture name for anything. Append random numbers and letters to it (ie: myTex_a01_b281_c21)

Fortunately, this only affects textures, so all you have to do is rename them. Materials will be automatically updated.

Just a small thing to watch out for!