Long-time Mapster user Sc2broodsc2 (or, more easily known as 'Fenix') has recently updated his 'all doodads project' to include all the cool new stuff we got in LotV. What does this mean, you ask? Simple: Fenix has gone through every single doodad currently available in the editor and screenshotted them. As such, we now have a comprehensive list of doodads that can be searched by picture. Say you're trying to create a Protoss base for your map and you've got an empty spot you need to fill up: you can scroll through the All Doodads project until you find one you like and immediately find the doodads' name, allowing the project to serve as a simple 'legend' of sorts when creating a terrain for your map.
Also included in the project as tilesets and cliffs, for those looking for more conceptual ideas. Happy terraining!