If you want to be very serious about setup and get as accurate as you can with measurements you can use the Music Nomad tools. Here is a link to look. MusicNomad Precision Setup Tools
I use all their tools. A little pricey probably but I find them to be very good. They are professional tools. Plenty of Luthiers use them. Comes with clear instructions and also you can find any number of videos showing how to use every tool. They have everything from action setting gauges, nut height, neck relief (truss rod gauge) for both acoustic and electric guitars and basses. The fretboard radius gauge is helpful as it guides you to the right action setting tools etc. Hard to put down in print but their instructions include pictures and the videos you can watch are very helpful as well.

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