I label, then pull the cable; as the last thing I want it to have both ends 75 feet apart and not be able to see which cable moves when I pull at one end( to see which label goes where). Lay those suckers out straight, slap a label on each end. For me I require RU & Port info before even running for best calculations.
I had a 42 Foot(calculated from referencing our floor plan) run recently and only had a 40 footer and the boss man says go install this, it is a rush. So I go to install the 40 Footer than I am told should work.... and it is 2 feet short.
So the next tip is; Trust your Gut!