viewports:
* order (mostly) matters. Setup conditional viewport displays at the start of the skin
* NEVER enable a viewport in a different one
* Use variables to control complex viewport regions (i.e if you have more than one viewport which might end up in a region)

images:
* Use bitmap strips in the same order as the conditional you are using them with - this allows %xd(<label>, %<other tag>) short form
* images can be layered but the *load order* defines the draw order, not the order in the skin (This is subject to change in the future though)

labels:
* DON'T use single letter labels for everything.