It's a time saver if you know the normal values from the basics: Na/K/Cl/CO2/Ca/BUN/Cr. Know basic blood (RBC/WBC/platelets) and MCV. I would not worry about thyroid or any hormones...if you need them, they are fast to look up. But you don't want to be looking over every chance you get, because that does wate time.
I found that if a lab value was supposed to be abnormal, it was ABNORMAL, not just a WBC of 11.5 (barely out of normal).
Also, remember that soemtimes the lab values don;t seem to make sense, and that is when you think of secondary causes (hyperparathyroidism, both steps)
electra