A "crutch" shared by my instrument instructor many summers ago was
to write C-R-A-F-T. Vertically on the left margin of my kneeboard
notepad.

When the clearance arrived, just fill in the blanks.

C= Clearance=N12345 is cleared to Wazoo City Airport
R= Route= via the Spamcan One Departure, V88, V34, direct
A=Altitude=climb and maintain 3000, expect 6000 10 minutes after departure
F=Frequency=departure frequency 123.45
T=Transponder=squawk 2345
                                 
When you get ready for the approach, another crutch is handy.
H-A-C                                                            

H=Heading=Piper 34A, turn right, heading 210,
A=Altitude=Maintain 4000 until established on the localizer,         
C=Clearance=Cleared for the Localizer Delta approach to runway 24 
                
Clearances come in a standard sequence and the crutches help you     
organize it quickly.  Doesn't hurt to learn the handy abbreviations so
you can understand your high-speed scribbling of clearances.
Best of luck.  The instrument rating is a mind-bender, but well worth
the effort.