Are you creating the same node setups over and over again?
I created these Node Groups to speed up my own and hopefully your workflow.
What you get:
Blur Node: Blurs and distorts textures (especially useful if you wanna convert a diffuse/albedo map to a heightmap)
Combine Normals: The name pretty much says it all it combines two different normal maps. You also get full controll over the RGB channels to tweak it if necessary + there is a Monochrome output that you can use as a AO map.
Edges: Detects edges & indentations so they can be used to create rough edges, mix different textures together etc.
How to install:
When you need them for a project just go to Files/ Append/ Nodes Group.blend/ Material
and click on append.
In the Shader Editor you can now just press shift+A and search for there names or go to Groups.