[chunkstyle]

Thanks for the scripting advice, always good to know.
My super fun tips are below.

Turning a layer into a shared layer (not really possible, but you can fake it)
When I wish i would've made a layer into a shared layer, I just lock everything else down but the layer i want to make shared. do a 'select all' then copy and paste onto the new shared layer, the items (in my experience) seem to paste into place. This obviously isn't a trick, more of a procedure really.

Creating a new distributed shared layer
The (not really a) trick is that if you want to share a layer over every layer you have without dragging it all around, just do it once, then right click and duplicate that layer. the duplicate will also be distributed as the original was and you can just delete the content while retaining the behavior.