I just use my own shorthand..
For taxi clearances, I just write the letters down, with vertical lines to indicate "hold short of":
"Turn right on juliet, left papa, contact 121.65 short of papa two"
J P | P2 .65
For IFR clearances:
"Cleared to Nashville via the Memphis 7 departure, climb and maintain 5,000 feet, expect flight level 230 ten minutes after departure, departure frequency 124.15, squawk 2078"
C BNA M7
5K 230 10
There are a million ways to do it. Just copy them down and be consistent in your approach.