Dynamic Eyelashes
So this is another very specific tip but I think is is a powerful one and maybe something that you will be using quite a bit if you are into characters. The idea is to setup a think strip of polygons as your base and then use a custom NanoMesh brush to create Dynamic Eyelashes (Dynamic as in non-destructive, so you can adjust the size, placement, rotation, etc without ruin the actual mesh of the eyelashes).

Workflow